Cursor window crashes on agent edit calls to files

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Very frequently when agents try to edit .jsx files and other files the cursor window crashes and reopens and the recent changes are lost in the window - cache is cleared. Started today and happens every 10 minutes. Around the time of the update that was sent out with the visual GUI designer (not being used). Something has corrupted the IDE code.

Window terminated unexpectedly - error 5

Steps to Reproduce

agent tries to edit file - around 10% of the time this happens

Expected Behavior

do not crash

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.2.17 (Universal)
VSCode Version: 1.105.1
Commit: cf858ca030e9c9a99ea444ec6efcbcfc40bfda70
Date: 2025-12-11T18:30:06.649Z (2 hrs ago)
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.5.0

For AI issues: which model did you use?

Opus 4.5 usually

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

Hey, thanks for the report. Let’s quickly narrow down the cause.

Please check:

  • Extensions
  • Run from terminal: cursor --disable-extensions
  • If crashes disappear, enable them one by one to find the culprit
  • CMD+Shift+P > Developer: Open Process Explorer and send a screenshot before the crash
  • Network
  • Settings > Network > Run Diagnostics
  • If using VPN/proxy/Zscaler - in App Settings CMD+, find HTTP/2 and enable Disable HTTP/2
  • Documentation: Common Issues | Cursor Docs
  • Clean environment
  • Open an empty folder without devcontainer and MCP and check if it reproduces

We need artifacts for engineers:

  • Errors from Help > Toggle Developer Tools > Console
  • Confirmation of the result from cursor --disable-extensions and the test on an empty folder
  • Whether you use VPN/Zscaler/another proxy
  • List of installed extensions
  • Whether it reproduces with manual editing without the agent and, if possible, a minimal repro/repo example

We are escalating this case. Please send the results and logs to attach them to the ticket and speed up the fix.

3

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