Hi folks,
There is an updated version of CodeMirror and all CodeMirror AddOns at: https://tiddlywiki.com/prerelease/plugins/tiddlywiki/codemirror/
If you use CodeMirror 5, It would be nice if you update and test the latest version and give feedback.
See the discussion about my testing at: Bump codemirror 5 plugin version to 5.65.19 by Leilei332 · Pull Request #9114 · TiddlyWiki/TiddlyWiki5 · GitHub
Thanks