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Toggle agent sessions sidebar freezes UI for seconds when Settings editor is open #283513

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Toggle agent sessions sidebar freezes UI for seconds when Settings editor is open#283513
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rzhao271
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bugIssue identified by VS Code Team member as probable bugfreeze-slow-crash-leakVS Code crashing, performance, freeze and memory leak issuesimportantIssue identified as high-prioritysettings-editorVS Code settings editor issues
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January 2026
@rebornix

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@rebornix
rebornix
opened on Dec 15, 2025
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  • Open Settings Editor
  • Have the secondary side bar open, open a session from the agent session view
  • Maximize -> it instantly maximizes
  • Toggle Maximize again
  • 🐛 Freeze for 2 seconds.

By reading the trace, it came from the massive layout calls in the Settings Editor

Trace-20251214T212220.json.gz

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bugIssue identified by VS Code Team member as probable bugfreeze-slow-crash-leakVS Code crashing, performance, freeze and memory leak issuesimportantIssue identified as high-prioritysettings-editorVS Code settings editor issues

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