Javascript editors trying to reinvent desktop paradigms but without the 40-odd years of practice and having all the events arrive whenever they feel like is one of the most frequent irritations of web-based platforms for me, because you use a text editor so frequently and therefore encounter its problems similarly often.
For example, earlier today I was editing a small internal app in Retool. I typed something, instinctively went for Cmd-Z, and it reverts a bunch of changes I made in the query I had open 5 minutes ago. Of course, by the time I spot it and hit Shift-Cmd-Z, the internal state has updated so now it redoes some other unrelated undo operation and I have two broken things to fix.
And then of course there's Notion, the champion of "you've hit a keyboard shortcut and it's applied it to something halfway across the screen from the selection, or possibly just given up trying to do anything useful and deleted a few paragraphs of text at random". Perhaps they were pining for the outrageously janky experience that was attempting to make even the most innocuous of formatting changes in earlier versions of Word For Windows.