User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-25999669-20201117191606/@comment-1807002-20201117193806

Question is this Visual Editor - Source Mode or Source Editor?

I had serious issues with Visual Editor - Source Mode including CSS effecting it which is why I was so happy they brought in Source Editor.

Visual Editor - Source Mode is just IMO bad and if you are using it, that explains it.