Thanks Matt for reporting this. As I mention in the article I do not have yet a very long experience of using VS Code for my Python scripts and notebook. So indeed I have not been exposed to that issue yet.

Two additional remarks:

• I’ve been told that issues on VS Code are prioritized according to the user votes, so we can invite the readers to thumb up here: https://github.com/microsoft/vscode-python/issues/7903
• The HackerNews thread mentions another issue: using the arrow keys in the notebook may revert the edits in the current cell: https://news.ycombinator.com/item?id=22168993