I am on a Mac, running Mac OS Big Sur 11.2.3. I've been testing transcribing sequences in Premiere Pro Beta V. 15.2.0 (Build 14), and I'm running into a funky bug.
I have a test sequence, with starting timecode of 00:59:54:00, and about 10 minutes of dialogue selects. If I transcribe the sequence, the transcription is generally accurate, but the transcription timecode starts at 01:59:48:01, so if I try to find a specific phrase, the playhead jumps an hour ahead in the sequence, where there are no video clips present. If I then move the video clips to where the incorrect transcription timecode starts, the playhead does as it should, and jumps to the correct moment in the dialogue stringout.
However, if I try to re-transcribe with the video clips at this new position, the new transcription timecodes again jump about an hour later. So every time I try to transcribe it is showing the wrong timecodes, and there's no way to manually change their start time to fix the error myself.