This is a known Windows issue where the renderer process hits a ~4GB memory limit (Electron limitation). There’s a similar thread with workarounds:
- Check for OTEL errors:
Ctrl+Shift+P> Developer: Toggle Developer Tools > Console - look for[otel.error]lines - Rotate chats: Start a new chat when the current one gets large (this was the accepted solution for another user)
- Monitor memory:
Ctrl+Shift+P> Developer: Open Process Explorer to watch the renderer process - Test extensions: Run
cursor --disable-extensionsfrom command line to see if an extension is contributing
If you see OTEL errors, consider downgrading temporarily to 2.3.34 from Download · Cursor and disabling auto-updates.