claude-code - 💡(How to fix) Fix Desktop app quits unexpectedly when Caps Lock is pressed [1 participants]

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anthropics/claude-code#55533Fetched 2026-05-03 04:50:57
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Claude Code Desktop closes/quits when the Caps Lock key is pressed. Reproduced multiple times.

Error Message

The app window closes without prompt or error message.

Root Cause

Claude Code Desktop closes/quits when the Caps Lock key is pressed. Reproduced multiple times.

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Description

Claude Code Desktop closes/quits when the Caps Lock key is pressed. Reproduced multiple times.

Environment

  • Platform: macOS (Darwin 24.6.0)
  • Claude Code Desktop version: 1.5354.0 (9a9e3d) — 2026-04-29T01:14:34.000Z

Steps to Reproduce

  1. Open Claude Code Desktop (focus anywhere in the app)
  2. Press the Caps Lock key
  3. App window closes / app quits

Expected

Caps Lock should toggle capitalization state, not close the app.

Actual

The app window closes without prompt or error message.

Additional Context

  • Reproduced multiple times with the same trigger
  • Cleared a 105 MB transcript file from ~/.claude/projects/ to rule out transcript-size issues — no effect, crash still reproduces
  • Total ~/.claude/projects/ size after cleanup: ~1 GB

extent analysis

TL;DR

The issue may be related to a specific keyboard event handling bug in Claude Code Desktop, and a potential fix could involve modifying the application's keyboard event handling logic.

Guidance

  • Investigate the keyboard event handling code in Claude Code Desktop to see if there's a specific condition that's causing the app to close when the Caps Lock key is pressed.
  • Check if there are any existing issues or pull requests related to keyboard event handling in the Claude Code Desktop repository.
  • Try to reproduce the issue with a minimal setup (e.g., a new project with no files) to see if the problem is related to the project size or content.
  • Consider adding error handling or logging to the keyboard event handling code to get more information about what's happening when the Caps Lock key is pressed.

Example

No code snippet is provided as the issue does not contain enough information about the codebase.

Notes

The issue may be specific to the macOS platform or the version of Claude Code Desktop being used. Further investigation is needed to determine the root cause of the problem.

Recommendation

Apply workaround: Modify the keyboard event handling code to ignore or handle the Caps Lock key press event differently, as the current behavior is causing the app to close unexpectedly.

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claude-code - 💡(How to fix) Fix Desktop app quits unexpectedly when Caps Lock is pressed [1 participants]