[Bug] Multiple Claude Code instances fail with Cursor IDE integration #13219

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1. github-actions

   added

   bugSomething isn't workingSomething isn't working

   platform:macosIssue specifically occurs on macOSIssue specifically occurs on macOS

   area:ide

   on Dec 6, 2025
2. github-actions commented on Dec 6, 2025

   

   github-actionsBot

   on Dec 6, 2025 – with GitHub Actions

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   Found 3 possible duplicate issues:

   1. [Bug] Session state confusion between multiple Claude Code instances #13089
   2. [BUG] Claude Code extension crashes inside Cursor (Extension Host loop-crashing) #11738
   3. [BUG] Subagent cascade bug: Multiple parallel instances spawn on test failure #7955

   This issue will be automatically closed as a duplicate in 3 days.

   • If your issue is a duplicate, please close it and 👍 the existing issue instead
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   🤖 Generated with Claude Code

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3. mariusmcl commented on Dec 7, 2025

   

   mariusmcl

   on Dec 7, 2025

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   this happens for me aswell

   👍React with 👍1Reacted by Cyprian Kowalczyk
4. iRonin commented on Dec 7, 2025

   

   iRonin

   on Dec 7, 2025

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   Claude Code has never been so unusable as it is right now.
5. siddhzx commented on Dec 7, 2025

   

   siddhzx

   on Dec 7, 2025 via email

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   Ye

   …

   On Sun, Dec 7, 2025 at 7:44 AM Cyprian Kowalczyk ***@***.***> wrote: *iRonin* left a comment (anthropics/claude-code#13219) <#13219 (comment)> Claude Code has never been so unusable as it is right now. — Reply to this email directly, view it on GitHub <#13219 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AY7DCNBCQUAA3T6HUWJ7YHT4AQVNNAVCNFSM6AAAAACOH5EQS6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMMRSGA3TCNZUHE> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>
6. github-actions commented on Jan 7, 2026

   

   github-actionsBot

   on Jan 7, 2026 – with GitHub Actions

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   This issue has been inactive for 30 days. If the issue is still occurring, please comment to let us know. Otherwise, this issue will be automatically closed in 30 days for housekeeping purposes.
7. github-actions

   added

   autocloseIssue will be closed automaticallyIssue will be closed automatically

   on Jan 7, 2026
8. github-actions commented on Feb 8, 2026

   

   github-actionsBot

   on Feb 8, 2026 – with GitHub Actions

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   This issue has been automatically closed due to 60 days of inactivity. If you're still experiencing this issue, please open a new issue with updated information.
9. github-actions

   closed this as not plannedon Feb 8, 2026
10. github-actions commented on Feb 15, 2026

    

    github-actionsBot

    on Feb 15, 2026 – with GitHub Actions

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    This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.
11. github-actions

    locked as resolved and limited conversation to collaborators on Feb 15, 2026