Sauce Labs

Affected: US-West, US-West, US-West, US-West, US-West, US-West, US-West, US-West, US-West, US-West

Failure mode: A zone, region or data center became unavailable. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-10-13 10:09 UTC

   On 13 October, between 05:10 UTC and 05:45 UTC, we experienced elevated error rates for VDC, RDC, Sauce Connect, and IPSec services in the US-West-1 data center. The issue has been resolved. All services are now fully operational.

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central, EU-Central

Failure mode: A provider or third-party service this vendor depends on failed. Root cause: A failure at a provider or vendor they depend on. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-10-13 08:58 UTC

   We are experiencing an issue with the Sauce Labs UI in EU-Central-1 data center. We are investigating.

2. investigating 2026-10-13 10:04 UTC

   We are still experiencing issues with the Sauce Labs UI in the EU-Central-1 data center. We are continuing to investigate.

3. investigating 2026-10-13 11:38 UTC

   We have made progress in narrowing down the cause of the ongoing Sauce Labs UI issues in the EU-Central-1 data center. The investigation is ongoing.

4. investigating 2026-10-13 13:30 UTC

   We are working closely with our third-party providers to resolve the ongoing issue in the EU-Central-1 data center. The investigation is ongoing.

5. investigating 2026-10-13 15:39 UTC

   We are continuing to work with our partners and relevant teams to investigate and resolve the ongoing issue in the EU-Central-1 data center. We will share further updates as more information becomes available.

6. resolved 2026-10-13 22:10 UTC

   The root cause of issue affecting our UI access in the EU-Central-1 is tied to an ongoing incident with one of our third-party infrastructure providers in the data center. While our team is keeping this incident ticket closed on our end, we are actively tracking the provider's...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, EU-Central, US-East

Failure mode: Data delayed, stale, lost or corrupted, or needing replay after recovery. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. investigating 2026-10-08 16:48 UTC

   We are experiencing a degradation in error ingestion for Error Reporting (Backtrace) using crashpad on Android and Linux across all Data Centers. We are currently investigating.

2. investigating 2026-10-08 16:52 UTC

   We are continuing to investigate this issue.

3. monitoring 2026-10-08 17:20 UTC

   The root cause of error ingestion for Error Reporting (Backtrace) has been identified. Remediation has been applied, and we are actively monitoring the situation.

4. resolved 2026-10-08 18:50 UTC

   After taking remedial action, the error ingestion issue in Error Reporting (Backtrace) has been resolved. All services are fully operational.

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-09-30 10:04 UTC

   We are currently seeing elevated error rates for real device tests in EU-Central-1 data center. We are investigating.

2. resolved 2026-09-30 11:18 UTC

   Real Device test error rates have returned to normal in the EU-Central-1 data center. All services are fully operational.

3. postmortem 2026-10-14 17:12 UTC

   ### **Dates:** Wednesday, September 30th 2026, 09:04 UTC - 10:49 UTC. ### **What happened:** Real Device Automated Tests experienced failure to start in the EU Central data center, with error rates reaching up to 25%. ### **Why it happened:** A deployment led to increased cache...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West

Failure mode: Network, DNS, routing or connectivity failure. Root cause: Hardware or facility. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-09-28 16:04 UTC

   We are currently seeing elevated error rates for automated real device tests in US-West-1 data center. We are currently investigating.

2. monitoring 2026-09-28 16:56 UTC

   The root cause of the elevated error rates for Real Device tests in the US-West-1 data center has been identified. Remediation has been applied, and we are actively monitoring the situation.

3. resolved 2026-09-28 17:19 UTC

   After taking remedial action, Real Device test error rates have returned to normal in the US-West-1 data center. All services are fully operational.

4. postmortem 2026-10-02 19:15 UTC

   ### **Dates:** Monday, September 28th 2026, 14:19 UTC - 16:52 UTC. ### **What happened:** Real device tests in US West hung and failed to output test artifacts due to slow uploads. ### **Why it happened:** A degraded interconnect link suffered high packet loss from optical...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A zone, region or data center became unavailable. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-09-23 12:45 UTC

   Between 12:05 UTC and 12:35 UTC, we experienced a high error rate and longer session start times for Desktop and Virtual Device tests in the US-West-1 data center. The issue has been resolved. All services are fully operational.

2. postmortem 2026-10-21 17:00 UTC

   ### **Dates:** Wednesday, September 23rd 2026, 12:05 UTC - 12:35 UTC. ### **What happened:** Virtual Device Cloud testing availability gradually decreased in the US-West-1 data center. ### **Why it happened:** A product defect was introduced causing Virtual Device Cloud testing...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A zone, region or data center became unavailable. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-09-16 11:08 UTC

   Between 09:52 UTC and 10:34 UTC, multiple Sauce Labs services in the US-West data center experienced an outage, causing authentication failures and disruptions to testing features. All systems are now fully operational.

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. investigating 2026-09-02 09:39 UTC

   We are seeing elevated error rates for Real Device tests in EU-Central-1 data center. We are investigating.

2. identified 2026-09-02 11:30 UTC

   The root cause of the elevated error rates for Real Device tests in the EU-Central-1 data center has been identified. Remediation has been applied, and we are actively monitoring the situation.

3. resolved 2026-09-02 11:53 UTC

   After taking remedial action, Real Device test error rates have returned to normal in the EU-Central-1 data center. All services are fully operational.

4. postmortem 2026-09-18 02:11 UTC

   **Dates:** Wednesday, September 2nd 2026, 08:30 UTC - 11:15 UTC. ### **What happened:** Real Device Automated Tests experienced failure to start in the EU Central data center, with elevated error rates reaching nearly 100% for short periods of time. ### **Why it happened:** A...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Login, tokens, certificates or credentials failed. Root cause: A human mistake during operations. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-08-25 12:33 UTC

   We are currently seeing elevated error rates for macOS and iOS tests in the US-West-1 data center. We are currently investigating.

2. resolved 2026-08-25 13:19 UTC

   After taking remedial action, all macOS and iOS tests are now performing as expected in the US-West-1 Data center. All services are fully operational.

3. postmortem 2026-09-03 20:23 UTC

   ### **Dates:** Tuesday August 25th 2026, 11:38 – 13:10 UTC ### **What happened:** Customers running macOS and iOS tests in our US-West region experienced degraded service. Roughly 50% of the virtual Mac capacity in the region stopped accepting new tests, so tests either queued...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Exhausted memory, disk, CPU, queues, connection pools or quotas. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-08-07 12:08 UTC

   We are currently seeing elevated error rates for virtual desktop tests in the US-West-1 datacenter. We are currently investigating.

2. resolved 2026-08-07 13:06 UTC

   After taking remedial action, Virtual Desktop tests are starting successfully in the US-West-1 Data center. All services are fully operational. We are closely monitoring the situation

3. postmortem 2026-08-14 16:43 UTC

   ### **Dates:** Friday, August 7th 2026, 11:00 UTC - 13:04 UTC. ### **What happened:** Windows and Intel Mac jobs in `us-west1` failed to start due to virtual machine \(VM\) allocation starvation. ### **Why it happened:** A service crash loop left VMs in an allocated but...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-07-16 13:00 UTC

   Between July 16th 13:03 UTC and July 16th 17:33 UTC, we experienced a service disruption where symbol archives utilizing multi-part upload protocols failed to process. Incident has been resolved and all services are operational.

2. postmortem 2026-08-14 16:48 UTC

   ### **Dates:** Thursday July 16th 2026, 13:03 – 17:33 UTC ### **What happened:** Symbol archives uploaded in multiple parts failed to process. All regions were affected. ### **Why it happened:** Our symbol processing service sent an upload-verification field that our cloud...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Login, tokens, certificates or credentials failed. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-07-14 23:30 UTC

   Between July 14th 23:45 UTC and July 15th 23:05 UTC, we experienced an issue where symbol archive uploads to Backtrace projects failed with HTTP 400 errors. Incident has been resolved and all services are operational.

2. postmortem 2026-08-14 16:47 UTC

   ### **Dates:** Tuesday July 14th 2026, 23:45 UTC – Wednesday July 15th 2026, 23:05 UTC ### **What happened:** Symbol archive uploads to Error Reporting \(Backtrace\) projects failed with HTTP 400 errors. All regions were affected. ### **Why it happened:** The credentials our...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central

Failure mode: A provider or third-party service this vendor depends on failed. Root cause: A failure at a provider or vendor they depend on. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-07-14 17:19 UTC

   We are experiencing an issue in the EU Central 1 data center, where iOS ARM Simulator app tests fail with infrastructure errors. We are investigating.

2. investigating 2026-07-14 18:05 UTC

   App downloads are taking longer than expected when these infrastructure errors are seen. We are continuing to investigate.

3. monitoring 2026-07-14 18:56 UTC

   We have deployed a fix for this issue. Tests should now be performing as expected in the EU Central 1 data center. We are monitoring.

4. monitoring 2026-07-14 19:11 UTC

   We are continuing to monitor for any further issues.

5. resolved 2026-07-14 20:23 UTC

   After taking remedial action and monitoring the situation, we are seeing iOS ARM application tests perform as expected in the EU Data Center. All services are fully operational.

6. postmortem 2026-07-29 17:40 UTC

   ### **Dates:** Tuesday July 14th 2026, 09:00 - 18:28 UTC ### **What happened:** iOS ARM tests running in our EU data center failed. ### **Why it happened:** A fault occurred with our primary network provider in our EU data center. ### **How we fixed it:** We failed over to a...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A configuration change caused the failure. Root cause: A configuration change. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2026-07-01 17:02 UTC

   On July 1st between 17:02 UTC and 21:31 UTC, macOS 14 tests were failing to start in the US-West and EU-Central data centers. This issue has been resolved. All services are fully operational.

2. postmortem 2026-08-11 20:37 UTC

   ### **Dates:** Wednesday July 1st 2026, 17:02 UTC - 21:31 UTC ### **What happened:** macOS 14 tests in the US West and EU Central data centers were unable to start. ### **Why it happened:** An internal datasource was unavailable due to a missing configuration entry. ### **How we...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-07-01 12:12 UTC

   We are experiencing an issue with accessing Appium Inspector in the US-West-1, EU-Central-1, and US-East-4 data centers. We are investigating.

2. resolved 2026-07-01 12:58 UTC

   We have identified the root cause and have deployed a fix for this issue. All services are fully operational.

3. postmortem 2026-07-20 20:34 UTC

   ### **Dates:** Wednesday July 1st 2026, 09:37 – 12:46 UTC ### **What happened:** The Appium Inspector feature, used during real device live testing sessions, became unavailable after a scheduled UI deployment. Users who attempted to use the feature during a live test were...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2026-06-24 16:39 UTC

   On June 24th between 08:28 UTC and 15:32 UTC, we experienced Real Device test session failures impacting Appium and Access API in the US East, US West and EU data centers. This issue has been resolved. All services are fully operational.

2. postmortem 2026-07-22 20:49 UTC

   ### **Dates:** Wednesday, June 24th 2026, 09:42 UTC - 15:45 UTC. ### **What happened:** Real Device test sessions using Appium and Access API experienced increased error rates in the US East, US West, and EU data centers. Sessions were timing out after approximately 90 seconds...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central

Failure mode: Hardware, power, cooling or another physical failure. Root cause: Not enough capacity for the load. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. monitoring 2026-06-18 06:12 UTC

   We have been experiencing device unavailability in our EU-Central-1 data center and have identified the root cause. We have taken remedial action and are currently monitoring.

2. resolved 2026-06-18 06:59 UTC

   After taking remedial action, we are now seeing real devices available for testing in the EU-Central-1 data center. All services are fully operational.

3. investigating 2026-06-18 07:30 UTC

   Around 3:51 AM UTC we started experiencing lower iOS device availability in the EU-Central data center. Our team is actively investigating the root cause and working toward a resolution.

4. postmortem 2026-07-06 17:17 UTC

   ### **Dates:** Thursday June 18 2026, 03:45 UTC - 06:45 UTC. ### **What happened:** Approximately 7% of iOS devices in our EU data center were temporarily unavailable for customer test sessions after a loss of power to the rack hosting them. ### **Why it happened:** The power...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-East, US-East, US-East, US-East, US-East, US-East, US-East

Failure mode: Login, tokens, certificates or credentials failed. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-06-01 14:02 UTC

   We are experiencing an issue where the US-EAST data center is currently unavailable. We are investigating.

2. investigating 2026-06-01 14:55 UTC

   We are continuing to investigate this issue.

3. investigating 2026-06-01 15:30 UTC

   We have identified the root cause and are working on implementing a fix.

4. monitoring 2026-06-01 16:02 UTC

   Access has been restored to the US-EAST data center. We are monitoring.

5. resolved 2026-06-01 18:24 UTC

   After taking remedial action, access to the US-EAST data center is fully restored. This incident is resolved.

6. postmortem 2026-06-15 23:32 UTC

   ### **Dates:** Monday, June 1st 2026, 13:06 UTC - 15:42 UTC. ### **What happened:** Customers served by the US-EAST-4 region were unable to authenticate or start new test sessions because an incomplete TLS certificate chain was deployed to the core directory services. ### **Why...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Login, tokens, certificates or credentials failed. Root cause: A configuration change. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-05-21 14:53 UTC

   Between May 13th 18:47 UTC and May 15th 9:23 UTC, we experienced test details not appearing in the dashboard of the US-East Data Center. This issue has been resolved. All services are fully operational.

2. postmortem 2026-05-26 15:07 UTC

   ### **Dates:** Wednesday, May 13th 2026, 18:47 UTC - Friday, May 15th 2026, 09:23 UTC. ### **What happened:** Customers were unable to access test run summaries for Real Device Cloud \(RDC\) jobs because events stopped publishing to the jobs Kafka topic in US-EAST. ### **Why it...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2026-04-24 16:33 UTC

   Between April 23rd 22:44 and April 24th 15:25 UTC, there was a technical issue that affected video recordings for tests running on macOS 15 and iOS within our EU and US-West Data Center. We identified the issue and deployed a fix. All systems are now fully operational.

2. postmortem 2026-05-13 15:05 UTC

   ### **Dates:** Thursday, April 23rd 2026, 22:43 UTC - Friday, April 24th 2026, 15:29 UTC ### **What happened:** Video assets were missing for virtual iOS simulator tests on ARM and macOS ARM desktop tests in the US-West and EU data centers. ### **Why it happened:** A product...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2026-04-16 10:10 UTC

   Between 02:00 and 11:15 CEST, live and automated tests on iOS 17.0 simulators were failing to start in the EU and US-West Data Center. We executed a deployment rollback, which restored services. All systems are now fully operational.

2. postmortem 2026-05-08 18:42 UTC

   ### **Dates:** Thursday, April 16th 2026, 00:00 UTC – 09:15 UTC ### **What happened:** Live and automated tests on iOS 17.0 simulators failed to start in both the EU and US-West data centers. Customers running tests on iOS 17.0 Intel-based simulators were unable to execute their...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, US-West, US-West, US-West, EU-Central, EU-Central, EU-Central, EU-Central

Failure mode: A code release introduced the failure. Root cause: A human mistake during operations. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. investigating 2026-04-07 15:02 UTC

   We are currently investigating reports of test failures affecting users running tests using SauceCtl in our US-West-1 and EU-Central-1 Data Center. We are investigating.

2. resolved 2026-04-07 16:13 UTC

   We have identified the root cause and have deployed a fix for this issue. All services are fully operational.

3. postmortem 2026-04-10 21:56 UTC

   ### **Dates:** Monday April 7th 2026, ~11:00 – 15:55 UTC ### **What happened:** Some customers experienced 503 errors when running tests via saucectl. The test-composer service was intermittently unavailable, preventing framework-based test execution. ### **Why it happened:** A...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2026-03-24 17:36 UTC

   Between 09:32 and 15:13 UTC, we identified a technical issue affecting iOS tests when running with network capture enabled. We've resolved the underlying cause and tests are working as expected. All services are fully operational.

2. postmortem 2026-04-10 23:06 UTC

   ### **Dates:** Tuesday, March 24th 2026, 09:32 UTC – 15:13 UTC ### **What happened:** Network calls failed on iOS devices during Real Device Cloud sessions where network capture was enabled. Approximately 12-13% of iOS sessions were affected. Android was not impacted. ### **Why...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, US-West

Failure mode: Network, DNS, routing or connectivity failure. Root cause: A configuration change. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-03-19 09:51 UTC

   Around 4:45 AM UTC we started experiencing lower iOS device availability in the US-West data center. Our team is actively investigating the root cause and working toward a resolution.

2. resolved 2026-03-19 10:54 UTC

   This incident has been resolved and our services are fully operational.

3. postmortem 2026-04-10 22:59 UTC

   ### **Dates:** Wednesday, March 19 2026, 04:45 UTC - 10:47 UTC. ### **What happened:** Approximately 15% of iOS devices in our US-West data center were temporarily unavailable for customer test sessions due to failed internet connectivity checks. ### **Why it happened:** An...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2026-03-13 14:30 UTC

   Between 14:43 and 15:11 UTC on March 13, a small subset of Real Devices (iOS and Android) became unavailable across all our data centers. After taking remedial action, the issue was identified and resolved. All services are fully operational.

2. postmortem 2026-04-10 22:57 UTC

   ### **Dates:** Friday, March 13th 2026, 14:43 UTC - 15:11 UTC. ### **What happened:** Real Devices \(iOS and Android\) availability gradually decreased across all data centers. ### **Why it happened:** A product defect was introduced resulting in a small subset of Real Devices...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, US-West, EU-Central, EU-Central, US-East, US-East

Failure mode: A provider or third-party service this vendor depends on failed. Root cause: A failure at a provider or vendor they depend on. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-03-10 18:46 UTC

   We are experiencing device unavailability in the US West 1, EU Central 1, and US East 4 data centers and have found that the issue is caused by a 3rd party service disruption. We are investigating.

2. resolved 2026-03-10 23:34 UTC

   This incident has been resolved.

3. postmortem 2026-04-09 21:07 UTC

   ### **Dates:** Tuesday March 10th 2026, 17:52 - 23:34 UTC ### **What happened:** The majority of iOS devices across all regions became unavailable. ### **Why it happened:** Apple's [ppq.apple.com](http://ppq.apple.com) app verification endpoint was down, causing internal device...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A human mistake during operations. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-03-06 21:38 UTC

   Between 21:38 UTC and 23:11 UTC, our virtual iOS and MacOS live and automated device tests were failing to start in the EU Data Center. We executed a deployment rollback, which restored services. All systems are now fully operational.

2. postmortem 2026-04-10 22:53 UTC

   ### **Dates:** Friday, March 6th 2026, 21:38 UTC - 23:11 UTC ### **What happened:** During the incident timeline, customers running virtual iOS simulator tests on ARM or macOS ARM desktop tests in the EU Data Center were unable to start new sessions for either live or automated....

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West

Failure mode: Data delayed, stale, lost or corrupted, or needing replay after recovery. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-02-27 18:42 UTC

   Live and automated real device test results are not being displayed on the test results page in the US-West-1 data center. We are investigating.

2. resolved 2026-02-27 20:15 UTC

   After taking remedial action, we are now seeing real device test results display in the US-West-1 data center. All services are fully operational.

3. postmortem 2026-04-15 19:06 UTC

   ### **Dates:** Friday, February 27th 2026, 16:15 UTC - 19:50 UTC ### **What happened:** Requests made using API client authentication would return 500 errors. ### **Why it happened:** An internal data structure became corrupted due to a race condition. ### **How we fixed it:**...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, US-West, US-West, US-West

Failure mode: A configuration change caused the failure. Root cause: A configuration change. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2026-02-23 17:22 UTC

   We are seeing an increase in automated tests using Sauce Connect failing with “Misconfigured -- No active tunnel found for provided identifier” errors in the US-West-1 data center. We are actively investigating.

2. investigating 2026-02-23 19:40 UTC

   We have identified the root cause and are working on implementing a fix. We are continuing to investigate.

3. resolved 2026-02-23 22:31 UTC

   We have identified the root cause and deployed a fix for this issue. All services are fully operational.

4. postmortem 2026-04-15 18:58 UTC

   ### **Dates:** Monday, February 23rd 2026, 17:22 UTC - 22:31 UTC ### **What happened:** WDIO-based tests run by customers using Sauce Connect 4 could not be started. ### **Why it happened:** Misconfiguration caused failing health checks in some cases, causing customer tunnels to...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Exhausted memory, disk, CPU, queues, connection pools or quotas. Root cause: A configuration change. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2026-01-29 17:30 UTC

   Application uploads and automated tests on our virtual and real device platforms in the US West Datacenter experienced intermittent errors today between 5:43 pm (UTC) and 9:45 pm (UTC). These issues were caused by an underlying infrastructure error within our storage services....

2. postmortem 2026-03-06 13:44 UTC

   ### **Dates:** Thursday, January 29th 2026, 19:30 UTC - 22:25 UTC. ### **What happened:** Application uploads and automated tests in the US-West-1 data center experienced intermittent errors between 5:43 pm \(UTC\) and 9:45 pm \(UTC\) ### **Why it happened:** Due to a high...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Network, DNS, routing or connectivity failure. Root cause: Network or DNS. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2026-01-29 11:11 UTC

   Between 8:00 CET - 9:45 CET, We were seeing elevated error rates and intermittent issues with test assets not being retained for tests on iOS and Mac virtual devices in our US-West-1 data center. The issue has now been resolved but some customers might see missing test assets.

2. postmortem 2026-02-03 14:01 UTC

   ### **Dates:** Thursday, January 29th 2026, 07:04 - 08:46 UTC. ### **What happened:** Between 07:04 UTC and 08:46 UTC on January 29, 2026, customers using our US-West-1 region experienced instability with Mac resources. Specifically: * Approximately 20% of iOS simulator jobs...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, US-West, US-West, US-West, US-West, US-West, US-West

Failure mode: Exhausted memory, disk, CPU, queues, connection pools or quotas. Root cause: Not enough capacity for the load. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. investigating 2026-01-13 10:43 UTC

   We are currently experiencing issues with our app storage service in the US-West-1 Data Center. We are investigating the issue.

2. resolved 2026-01-13 10:50 UTC

   After taking remedial action, the app storage service has been restored in the US-West-1 Data Center. All services are fully operational.

3. postmortem 2026-02-03 13:56 UTC

   ### **Dates:** Tuesday, January 13th 2025, 9:10 UTC - 10:37 UTC. ### **What happened:** The App Storage Service experienced high response times in the US-West-1 datacenter. ### **Why it happened:** Due to a high number of concurrent uploads, the App Storage Service experienced...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, US-West

Failure mode: Network, DNS, routing or connectivity failure. Root cause: A human mistake during operations. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. monitoring 2026-01-05 21:15 UTC

   We have been experiencing device unavailability in our private device cloud in the US data center and have identified the root cause. We have deployed a fix and we are monitoring.

2. resolved 2026-01-05 22:24 UTC

   We were experiencing device unavailability in our private device cloud in the US data center and we have deployed a fix. This issue has been resolved. All services are fully operational.

3. postmortem 2026-02-20 11:03 UTC

   ### **Dates:** Monday, January 5th 2026, 20:40 UTC - 21:04 UTC. ### **What happened:** There was a decrease in Real Device availability in the US-West-1 datacenter. ### **Why it happened:** During a planned traffic flow migration, a network policy applied to the new traffic path...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Exhausted memory, disk, CPU, queues, connection pools or quotas. Root cause: Not enough capacity for the load. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2025-12-18 05:30 UTC

   Between 5:40 UTC and 7:20 UTC, we experienced a high job error rate of all tests (Manual and Automated, Real Devices and Virtual Devices) in the US-West-1 data center. This issue has been resolved. All services are fully operational.

2. postmortem 2026-02-20 10:15 UTC

   ### **Dates:** Thursday, December 18th 2025, 5:32 UTC - 7:09 UTC. ### **What happened:** The App Storage Service experienced high response times in the US-West-1 datacenter. ### **Why it happened:** Due to a high number of concurrent uploads, the App Storage Service experienced...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2025-12-17 10:30 UTC

   Between 10:37 UTC December 17th and 11:59 UTC December 18th, we were experiencing issues downloading applications via Mobile App Distribution. This issue has been resolved. All services are fully operational.

2. postmortem 2026-01-05 16:04 UTC

   ### **When it happened:** Wednesday, December 17th 2025, 10:37 UTC - Thursday, December 18th 2025, 11:59 UTC ### **What happened:** Applications were unable to be downloaded via Mobile App Distribution for a subset of customers. ### **Why it happened:** A product change combined...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: Mobile App Distribution Platform, Mobile App Distribution UI

Failure mode: Login, tokens, certificates or credentials failed. Root cause: A configuration change. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2025-11-19 18:54 UTC

   We are currently receiving reports indicating that customers are unable to log in to App Distribution using Single Sign-On (SSO). Our team is actively investigating the root cause and working toward a resolution.

2. identified 2025-11-19 19:36 UTC

   We identified the root cause and are now working to restore the service.

3. resolved 2025-11-19 22:17 UTC

   Earlier today, customers were unable to log in to App Distribution via SSO. After taking remedial action, users are now able to login successfully. This incident is resolved.

4. postmortem 2026-01-05 17:25 UTC

   ### **Dates:** Wednesday, November 19th 2025, 09:00 UTC – Thursday, November 20th 2025, 21:00 UTC ### **What happened:** Following a scheduled maintenance deployment, a subset of customers utilising Single Sign-On \(SSO\) were unable to log in to the platform. While the...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central

Failure mode: Exhausted memory, disk, CPU, queues, connection pools or quotas. Root cause: Not enough capacity for the load. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. investigating 2025-11-04 08:02 UTC

   We are currently seeing issues accessing the Sauce Home, Insights, Test Results, API in EU-Central-1. We are investigating.

2. resolved 2025-11-04 11:10 UTC

   The access to Sauce Labs Home, Test Results, Insights, API has been restored. All services are fully operational.

3. postmortem 2026-01-06 14:40 UTC

   ### **Dates:** Monday November 4 2025, 04:35 UTC - 08:20 UTC. ### **What happened:** The web UI for Insights and Test Results was intermittently unresponsive. ### **Why it happened:** A data store of components of the UI experienced unexpectedly high load, resulting in an...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Exhausted memory, disk, CPU, queues, connection pools or quotas. Root cause: Not enough capacity for the load. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2025-11-03 16:00 UTC

   Access to test results was interrupted in our EU Data Center from 12:40 UTC to 14:25 UTC. The issue has been identified and resolved.

2. postmortem 2025-12-11 17:16 UTC

   ### **Dates:** Monday November 3 2025, 12:40 UTC - 14:25 UTC. ### **What happened:** The Sauce Labs dashboard for Insights and Test Results was unresponsive, causing issues showing test results and related information. ### **Why it happened:** A data store for some components of...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2025-10-29 09:27 UTC

   We are currently experiencing issues with live test execution on Real Devices for IOS and Android in the US-West-1 datacenter. We are investigating.

2. resolved 2025-10-29 10:47 UTC

   After taking remedial action, live tests on Real Devices are now running normally in the US-West-1 Data Center. All services are fully operational.

3. postmortem 2025-12-11 16:51 UTC

   ### **Dates:** Monday, October 27th 2025, 15:27 UTC - Wednesday, October 29th 2025, 11:34 UTC. ### **What happened:** Real Device Live Testing availability gradually decreased in the US-West-1 data center. ### **Why it happened:** A product defect was introduced which caused...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2025-10-28 16:13 UTC

   Between 14:07 UTC and 15:25 UTC, we experienced a high error rate for automated and manual Real Device tests in the US-West, US-East, and EU data centers. This issue has been resolved. All services are fully operational.

2. postmortem 2025-12-11 16:24 UTC

   ### **Dates:** Tuesday, October 28th 2025, 14:03 UTC - 15:18 UTC \(primary incident\) Tuesday, October 28th 2025, 15:18 UTC - Thursday, October 30th 2025, 8:25 UTC \(~1% of devices impacted window\) ### **What happened:** Test executions using the 'stable' Appium version...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2025-10-28 12:53 UTC

   We are currently seeing elevated error rates for browser tests running on Windows 8 & 10 in the EU-Central-1, we are currently investigating.

2. resolved 2025-10-28 14:22 UTC

   After taking remedial action, Windows browser tests are now running normally, this incident is resolved.

3. postmortem 2025-11-06 16:00 UTC

   ### **Dates:** Tuesday, October 28th 2025, 11:40 UTC - 14:05 UTC. ### **What happened:** Windows based tests in the EU data center were failing on startup which led to a decrease in availability of Windows-based Virtual Machines. ### **Why it happened:** A product defect was...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: Exhausted memory, disk, CPU, queues, connection pools or quotas. Root cause: Not enough capacity for the load. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2025-10-28 11:30 UTC

   Between 11:20 UTC and 12:10 UTC, we experienced a high error rate of virtual Android tests in the US-West-1 data center. This issue has been resolved. All services are fully operational.

2. postmortem 2025-12-11 16:33 UTC

   ### **Dates:** Thursday, October 9th 2025, 10:28 UTC - Tuesday, November 11th 2025, 11:34 UTC. ### **What happened:** Virtual Android testing availability gradually decreased in the US-West-1 data center, this led to increased error rates in starting sessions, The error rates...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2025-10-01 01:00 UTC

   Between 13:54 UTC on October 1, 2025, and 10:22 UTC on October 2, 2025, some automated Android Emulator tests failed intermittently in our US West and EU Central data centers. This was caused by a screen resolution change. We fixed the issue and all services are now fully...

2. postmortem 2025-12-11 16:16 UTC

   ### **Dates:** Wednesday, October 1st 2025, 10:34 UTC - Thursday, October 2nd 2025, 22:22 UTC ### **What happened:** Virtual Android and Visual tests using the “Android GoogleAPI Emulator” were failing if they contained conditioned that required the exact app dimensions. ###...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A zone, region or data center became unavailable. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. resolved 2025-09-19 05:30 UTC

   Between 06:30 and 08:35 UTC we were seeing errors when selecting and starting Live and Automated Android Emulator tests in US-West-1 & EU-Central-1 Data Centers. This has now been resolved.

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central, EU-Central

Failure mode: Orchestration, control plane, service discovery or load balancing failed. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with low confidence (taxonomy v0.2).

1. investigating 2025-09-03 16:34 UTC

   We are currently seeing app storage upload issues in the EU datacenter. We are investigating.

2. resolved 2025-09-03 17:10 UTC

   After taking remedial action, the app storage service has been restored in the EU Data Center. All services are fully operational.

3. postmortem 2025-12-11 16:00 UTC

   ### **Dates:** Wednesday September 5th 2025, 13:50 UTC - 16:31 UTC ### **What happened:** The App Storage Service in the EU Central 1 data center experienced elevated response times, leading to timeout errors with uploading applications. ### **Why it happened:** The App Storage...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Failure mode: A code release introduced the failure. Root cause: A bug in the vendor's own code. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. resolved 2025-08-19 19:00 UTC

   Between 16:15 -16:55 UTC, automated Android Real Device tests were intermittently failing to start in our US West Data Center. We took remedial action and the problem was resolved. All services are fully operational.

2. postmortem 2025-09-10 14:45 UTC

   ### **Dates:** Friday August 19th 2025, 16:20 UTC - 16:55 UTC. ### **What happened:** During the times stated, automated Android real device tests were failing to start intermittently in the US-West-1 datacenter. ### **Why it happened:** A defect was introduced by a deployment...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: US-West, US-West, US-West, US-West, US-West

Failure mode: CDN or edge layer failed or served bad content. Root cause: An external attack. Tagged by claude-haiku-5-5 with medium confidence (taxonomy v0.2).

1. investigating 2025-07-22 08:50 UTC

   We are currently seeing intermittent errors accessing the US-West-1 Sauce Labs dashboard. We are investigating.

2. investigating 2025-07-22 09:53 UTC

   We are continuing to investigate this issue.

3. monitoring 2025-07-22 12:07 UTC

   We have been seeing intermittent errors accessing the US-West-1 Sauce Labs dashboard. We have identified a solution and have deployed a fix for this issue. We are monitoring.

4. resolved 2025-07-22 13:19 UTC

   After taking remedial action, the Sauce Labs dashboard is now stable and available. This incident is resolved.

5. postmortem 2025-08-20 10:02 UTC

   ### **Dates:** Tuesday July 22d 2025, 07:28 UTC - 15:07 UTC. ### **What happened:** The Sauce Labs dashboard for our US-West-1 datacenter was unavailable intermittently during the incident timeline. ### **Why it happened:** This issue was caused by Cache poisoning via a specific...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central, EU-Central

Failure mode: Network, DNS, routing or connectivity failure. Root cause: Hardware or facility. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2025-07-02 10:11 UTC

   We are currently experiencing reduced availability of Real Devices in our EU-Central-1 datacenter. We are investigating.

2. investigating 2025-07-02 11:12 UTC

   We are continuing to see reduced availability of Real Devices in our EU-Central-1 datacenter. We are continuing to investigate.

3. investigating 2025-07-02 11:50 UTC

   We have identified a networking issue in the EU-Central-1 datacenter, resulting in a high error rate in EU Real Device tests. We are continuing to investigate.

4. investigating 2025-07-02 16:19 UTC

   We are actively working on a solution to resolve the networking issues being seen in the EU datacenter, which involves replacing failed hardware. A high error rate will continue to be seen with EU Real Device tests in the meantime.

5. resolved 2025-07-02 20:11 UTC

   Our Android devices are now fully operational in EU-Central Data Center. We are currently experiencing a slight reduction in available public and private iOS devices in the EU-Central Data Center, which is leading to degraded availability for our iOS user base. We have...

6. postmortem 2025-07-16 10:45 UTC

   ### **Dates:** Wednesday July 2nd 2025, 09:74 UTC - 17:19 UTC. ### **What happened:** Approximately half of our real devices in the EU-Central-1 datacenter became unavailable for testing. ### **Why it happened:** There was a critical failure with a device within our network...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central, EU-Central, EU-Central, EU-Central

Failure mode: Network, DNS, routing or connectivity failure. Root cause: The vendor does not say why it happened. Tagged by claude-haiku-5-5 with low confidence (taxonomy v0.2).

1. investigating 2025-06-18 11:53 UTC

   We are currently experiencing issues with our app storage service in the EU Data Center. We are investigating.

2. resolved 2025-06-18 12:54 UTC

   After taking remedial action, the app storage service has been restored in the EU Data Center. All services are fully operational.

3. postmortem 2025-07-07 08:56 UTC

   ### **Dates:** Wednesday June 18th 2025, 11:04 UTC - 12:23 UTC ### **What happened:** The service responsible for App storage and retrieval experienced long response times. ### **Why it happened:** The App storage service was experiencing connectivity issues. ### **How we fixed...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.

Affected: EU-Central, EU-Central, EU-Central

Failure mode: A zone, region or data center became unavailable. Root cause: A human mistake during operations. Tagged by claude-haiku-5-5 with high confidence (taxonomy v0.2).

1. investigating 2025-06-16 12:49 UTC

   We are currently experiencing reduced availability of Real Devices in our EU-Central-1 datacenter. We are investigating.

2. resolved 2025-06-16 13:29 UTC

   After taking remedial action, we are seeing normal availability levels of Real Devices in our EU-Central-1 datacenter. This incident is resolved.

3. postmortem 2025-06-20 08:17 UTC

   ### **Dates:** Monday June 16th 2025, 12:25 UTC - 13:20 UTC ### **What happened:** Approximately 50% of RDC devices in the EU-Central-1 datacenter were unavailable. ### **Why it happened:** Maintenance on the datacenter power supply led to devices being shut down. ### **How we...

Excerpts are shortened. Read the full incident on Sauce Labs's status page.