2026-March-19 Service Incident

Update timeline

1. investigating Mar 19, 2026, 09:51 AM 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 Mar 19, 2026, 10:54 AM UTC

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

3. postmortem Apr 10, 2026, 10:59 PM 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 automated wireless network optimization feature adjusted transmit power levels on access points serving the affected devices, degrading wireless connectivity and causing devices to fail their availability checks. ### **How we fixed it:** The affected access points were identified and restarted, restoring normal wireless connectivity. ### **What we are doing to prevent it from happening again:** Evaluation of the automated optimization tools and a monitoring improvement.