Consolidate all audio tracks. It sounds like a plugin may be having an issue with a track that got chooped up or recorded in sections.

Double click from-thru
set start to be 1-1-0 thru 600-1-0 (or enough to cover whole song.
Then highlite all audio tracks and try Track - Consolidate audio region.


I do not work here, but the benefits are still awesome
Make your sound your own!