Captions kept undoing on its own.
After transcribing and importing the transcription into captions, I can be editing a huge chunk of the captions and without warning, the caption would undo my edits on its own. It's really becoming a pain as I would have to constantly backtrack and fix the captions all over again, multiple times.
Mike Michika commented
This is happening to me as well after updating to 15.4.1. I'm going to downgrade to see if it fixes the problem, but for now I cannot finish a simple caption task.
Update: downgrading to 15.4.0 fixed the captions problem for about an hour, then the problem came right back. This is preventing me from doing my job.