Highlighting/Selecting text and clicking at specific text broken in jupyter notebook cells

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Highlighting/selecting text or clicking at specific points in the text inside of a jupyter notebook code cell does not work.

Steps to Reproduce

Open a jupyter notebook and populate a python code cell with some code to produce an output (like a plot). Then click the side-bars to hide the code cells. Run all of the code cells, then re-expand the code cell by double clicking. Then try clicking within the code cell to select text in the middle of a line (like double clicking a value inside of a parenthesis or list). Try placing your cursor on some text and click or double click, and observe how it does not move your typing cursor to that location OR select the text. (see attached screen recording for an example, I am clicking repeatedly where my cursor hovers over parts and nothing happens, with intermittent success with highlighting at times, but at weird/wrong spots where i did not click, otherwise clicking and double clicking are not working).

Expected Behavior

If I click on some text position, the typing cursor should move to that location. Additionally, I should be able to highlight lines of text by clicking and dragging over text. It seems to happen with some text and not others. Sometimes i can click within the middle of a line (for example, double clicking a python entry in a list should highlight that value), it works, and others it won’t allow me to click inside the list and the typing indicator will stay on the outsides of the lines only.

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.77 (user setup)
VSCode Version: 1.99.3
Commit: ba90f2f88e4911312761abab9492c42442117cf0
Date: 2025-11-13T23:10:43.113Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

Hey, thanks for the report.

I tried to reproduce the issue by following your steps (hiding code cells, running all, then expanding with a double-click), but I wasn’t able to reproduce the clicking/selection problems you’re seeing.

It looks like this might be environment-specific. Please help narrow it down and share:

  • Jupyter extension version:

    • Help → Extensions → type “Jupyter” — which version is installed?
  • Test without extensions:

    • Run cursor --disable-extensions from the terminal
    • Try the same notebook workflow again
  • Console errors:

    • Help → Toggle Developer Tools → Console tab
    • Check if any errors appear when clicks stop working and send a screenshot if they do
  • Python environment:

    • Which Python kernel / version are you using?

Also, does this happen with every notebook or only specific files? And do you have any other extensions that might interact with notebooks?

These details will help us understand what’s going on.

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