Sauce Labs Incident History

### **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 or becoming stuck in the "Connecting" state, preventing them from being closed. ### **Why it happened:** A product defect was introduced, causing Real Device test sessions to fail to start and preventing active sessions from being closed. ### **How we fixed it:** Rollback to a stable version. ### **What we are doing to prevent it from happening again:** Improve monitoring & alerting and enhance post deployment validation.

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.

### **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 presented with a 500 error, disrupting their active testing session. Automated test pipelines were not affected. ### **Why it happened:** A routine upgrade of a core frontend library introduced an incompatibility with the Appium Inspector's rendering logic. The previous library version tolerated the pattern, but the updated version did not. The issue was not caught before deployment due to insufficient end-to-end test coverage for this specific feature. ### **How we fixed it:** We rolled back the UI to the last known working version to restore the feature immediately, and then deployed a targeted fix for the incompatibility. ### **What we are doing to prevent it from happening again:** We are adding end-to-end test coverage for the Appium Inspector feature to ensure it is validated automatically before future deployments.

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

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.

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.

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.

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.

We are continuing to monitor for any further issues.

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.

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

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.