Outage in Anthropic
Claude Desktop app unresponsive
Resolved MajorIncident Report
Summary AI Generated
The Claude Desktop app became unresponsive for users with scheduled tasks in Claude Cowork or Claude Code who were in timezones observing daylight saving time, caused by an infinite loop when the app couldn't resolve tasks scheduled during the "skipped" hour. The incident affected desktop functionality for 47 hours, with scheduled tasks disabled during the outage. The issue was resolved through app version 1.1.5749 and backend fixes.
We have identified the issue and are working on a mitigation. Currently, scheduled tasks are disabled for cowork and claude code desktop.
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Latest Updates ( sorted recent to last )
RESOLVED
about 1 month ago - at 03/10/2026 04:52PM
This incident has been resolved.
MONITORING
about 1 month ago - at 03/08/2026 07:42PM
Root cause: Users with scheduled tasks in Claude Cowork or Claude Code who are in a timezone that observed daylight saving time last night were affected by an infinite loop. When the app tried to locate tasks scheduled during the “skipped” hour, it couldn’t resolve them and got stuck.
Fix: Update to version 1.1.5749 via https://claude.com/download. If you’re unable to update right away, temporarily switching to a timezone that doesn’t observe daylight saving time will also resolve the issue.
We’re working on a backend fix as well. We know disruptions to Claude affect your work, and we apologize for the trouble.
IDENTIFIED
about 1 month ago - at 03/08/2026 07:42PM
Root cause: Users with scheduled tasks in Claude Cowork or Claude Code who are in a timezone that observed daylight saving time last night were affected by an infinite loop. When the app tried to locate tasks scheduled during the “skipped” hour, it couldn’t resolve them and got stuck.
IDENTIFIED
about 1 month ago - at 03/08/2026 06:27PM
The issue has been identified and a fix is being implemented.
INVESTIGATING
about 1 month ago - at 03/08/2026 05:57PM
We have identified the issue and are working on a mitigation. Currently, scheduled tasks are disabled for cowork and claude code desktop.
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