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Incident detail

2026-January-29 Resolved Service Incident

Resolved incidentMinor

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  1. Resolved

    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. Resolved

    ### 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 failed to start due to infrastructure errors.
    • 10% of Virtual MacOS/iOS jobs failed to upload assets to S3. As a result, logs, videos, and screenshots for these specific jobs were lost and remain unavailable for download.

    ### Why it happened:

    Scheduled maintenance on a primary network circuit coincided with high traffic volume, which led to congestion on the backup circuit.

    ### How we fixed it:

    Full connectivity was restored when traffic was routed back to the primary circuit following the completion of maintenance.

    ### What we are doing to prevent it from happening again:

    Review network redundancy strategies and consider upgrading backup circuit capacity to ensure it can support peak traffic loads.