The IDE kernel crashes, and I can’t run scripts because the status suddenly changes to “pending.”
The temporary workaround is to reload the window or restart Cursor entirely. I’ve tried several ways to fix this, such as always updating to the latest version and installing/uninstalling Jupyter extensions, but nothing seems to work. This has been happening for about 2–3 months.
Steps to Reproduce
It happens randomly. You open a Jupyter notebook, and suddenly you can’t run the next cell. You have to interrupt, restart, and reload the window or close Cursor entirely.
Hey, thanks for the report. This is a known class of issues with Jupyter in Cursor, and the team is aware and tracking it.
A few questions to help narrow it down:
Are you running the notebook locally, or connecting over SSH to a remote machine?
What exact Cursor version are you on? Go to Cursor > About Cursor and paste the info from there.
When the crash happens, open Developer Tools with Cmd+Shift+P, then run Developer: Toggle Developer Tools, go to the Console tab, and send any red errors you see.
Also, try these quick checks:
Turn off Cursor Tab: Settings > Tab > Cursor Tab, disable it, restart Cursor, and use the notebook for a while. Tab autocomplete has been linked to Jupyter freezes in similar reports.
Test without extensions: run cursor --disable-extensions in a terminal, open the notebook, and see if the issue still happens.
