Not sure if this is what's happening here, but there are known problems with tempo changes and truncating tracks. The ACW automatically inserts a tempo change, at least in the first bar, even if you do not change the overall tempo the ACW comes up with. When back in the tracks window and regenerating tracks, truncating and other strange things occur, and there is not yet a fix for this.

Terry


BIAB/RB 2018 PlusPak. Dell Inspiron23 running Win10, 12GB RAM, 2.5GHz i7, Presonus AudioBox USB interface.