Diagnostic keeps breaking since a few releases

So i don't know when this exactly started, but sometimes after copy/pasting code around the diagnostic produces errors that it thinks are in the code, but are not there. Sometimes i can recover this by selecting all text, cutting it out and back in. Using VSCode 1.53.0. It shows a lot of garbage errors, a lot of . (dot) syntax errors, brackets, wrong globals etc, just parsing the file weirdly.