# 2026-April-16 Resolved Service Incident

- Provider: [Sauce Labs](https://down.guide/saucelabs)
- Level: confirmed
- Impact: Degraded
- lasted 0m
- started 2026-04-16 10:10 UTC
- eu, us
- id: DWN-3382113d65
- Official page: https://stspg.io/kd3z9szx8n3c

## Updates from Sauce Labs
### 2026-04-16 10:10 UTC: resolved
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.

### 2026-05-08 18:42 UTC: postmortem
### \*\*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 tests for approximately 9 hours.
### \*\*Why it happened:\*\*
A deployment introduced an incompatibility affecting iOS 17.0 on Intel-based infrastructure. The issue was not caught prior to release due to insufficient post-deployment test coverage for that specific simulator configuration.
### \*\*How we fixed it:\*\*
We performed a rollback to the previous deployment, which restored full iOS 17.0 simulator functionality.
### \*\*What we are doing to prevent it from happening again:\*\*
We are reviving and expanding automated post-deployment tests to cover a broader range of simulator configurations, including legacy Intel-based iOS versions, to catch incompatibilities before they reach production.

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