# 2026-April-16 Resolved Service Incident

- Provider: [Sauce Labs](https://down.guide/providers/saucelabs)
- Confidence: Confirmed
- Impact: Operational
- lasted 0m
- started 2026-04-16 10:10 UTC
- eu, us
- Sauce Labs states the impact was 2026-04-16 00:00 to 09:15 UTC (9h 15m)
- 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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