VS Code Jupyter Notebook cells hidden when

Bug description

OneWayAnova_JupyterNotebook_Guide.zip

Steps to reproduce

1. Open VS Code with Quarto extension (verson 1.120.0) enabled.

Note: Using VS Code version as follows:
Version: 1.99.2 (user setup)
Commit: 4949701c880d4bdb949e3c0e6b400288da7f474b
Date: 2025-04-10T01:21:25.295Z
Electron: 34.3.2
ElectronBuildId: 11161073
Chromium: 132.0.6834.210
Node.js: 20.18.3
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

2. Open attached .ipynb file (one_way_anova_examples.ipynb).
3. Jupyter notebook file opens with 4 cells hidden. See screenshot.

No way to unhide the cells is apparent.

4. Disabling the Quarto extension and reopening VS Code appears to solve the issue.

Actual behavior

Hidden cells in Jupyter Notebook while the Quarto Extension is enabled

Expected behavior

Cells are shown and can be edited

Your environment

VS Code (managed by Anaconda Navigator):
Version: 1.99.2 (user setup)
Commit: 4949701c880d4bdb949e3c0e6b400288da7f474b
Date: 2025-04-10T01:21:25.295Z
Electron: 34.3.2
ElectronBuildId: 11161073
Chromium: 132.0.6834.210
Node.js: 20.18.3
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

Python 3.12.9

Start with the attached one_way_anova_examples.ipynb and reproduce the hidden-cell behavior in VS Code 1.99.2 with the Quarto extension enabled, then compare it with the extension disabled. Trace the Quarto extension's handling of Jupyter notebook cells; done means the four cells are visible and editable while the extension remains enabled.