■ Issue Description
An issue has been reported where Notebook cells may unexpectedly become blank and subsequently uneditable during operation. This problem is currently suspected to be associated with Jupyter Lab version 4.3.1. This article provides troubleshooting steps to address this situation.
■ Procedure
To address the issue, first access the Setting Editor via the Settings menu within the JupyterLab menu bar. Next, choose Notebook from the options listed in the left panel. Proceed to find the setting labeled Windowing mode. Finally, adjust its value by selecting none.
# Please note that this change will make the minimap feature implemented in JupyterLab 4 unavailable. For more information on the minimap, please refer to the official blog.
■ Reference
https://github.com/jupyter/notebook/issues/7523#issuecomment-2488340911