Claude Desktop app unresponsive

highAnthropicMar 8, 2026 17:57Duration: 46h 55m
api
API Issue

Summary

This incident has been resolved.

Impact

major

Timeline

Mar 8, 2026 17:57

[investigating] We are currently investigating this issue.

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+0m
Mar 8, 2026 17:57

[investigating] 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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+31m
Mar 8, 2026 18:27

[identified] The issue has been identified and a fix is being implemented.

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+1h 15m
Mar 8, 2026 19:42

[identified] 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.

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+0m
Mar 8, 2026 19:42

[monitoring] 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.

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+45h 10m
Mar 10, 2026 16:52

[resolved] This incident has been resolved.

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Lessons Learned

Anthropic has experienced 33 incidents in the past year. This frequency suggests systemic reliability challenges that may warrant additional monitoring.

📊Incidents related to api have occurred 182 times across all providers in the past year. This is one of the most common failure categories in cloud infrastructure.

💡This incident is categorized as: API Issue. Consider implementing preventive measures specific to this failure category.