Audio error cut-off end of senteces after rendering

have a 53 minute project and after editing for 100+ hours I've finally got the end result.

Playback sounds normal.

But after rendering I get a audio error/cut-off in many ends of sentences (definitely not cut-off in the project). Link to example in comments.

Anyone recognize this problem or know how to fix it?

I've tried to:
- Export timeline and open in new project
- Cut and paste audio in new tracks
- Cut and paste audio in new compound clip
- Render in MP4 (AAC)
- Render in MOV (Linear PCM)