Restart Extension host breaking AI panel

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Hey, recently using Developer: Restart extension host on cursor has caused the AI window to fail. You can type but every time you click upload there’s a brief loading icon then nothing and it appears as though you never clicked it.

Steps to Reproduce

To test this simply open the AI panel then do cmd + space >restart extension host then click the Developer: Restart extension host and try to use the AI panel to chat.

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.46 (Universal)
VSCode Version: 1.105.1
Commit: ab326d0767c02fb9847b342c43ea58275c4b1680
Date: 2025-12-02T03:59:29.283Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

No - Cursor works, but with this issue

Hey, thanks for the report.

Can you check a couple of things as a temporary fix:

  • Run “Developer: Reload Window” or fully restart Cursor Cmd+Q - does the AI chat start sending again?
  • Does the bug repeat with extensions disabled? Launch from terminal: cursor --disable-extensions and repeat the steps.

And help with diagnostics:

  • Open Help > Toggle Developer Tools, reproduce the bug (after Restart Extension Host) and send errors from the Console tab.
  • Tell me if other AI inputs work after that (CMD+K / Inline Edit)?
  • If you can send a message at least once, copy the Request ID (in chat menu > Copy Request ID).

If it reproduces stably even without extensions - we’ll raise a bug for fix.

  • Run “Developer: Reload Window” or fully restart Cursor Cmd+Q - does the AI chat start sending again?

this works but is extremely annoying to do because it closes all of my terminals too.

  • Does the bug repeat with extensions disabled? Launch from terminal: cursor --disable-extensions and repeat the steps.

yes.

-Tell me if other AI inputs work after that (CMD+K / Inline Edit)?
They work

Errors from toggled dev tools