Audio cutting of early at least measure

My music cut out at the last measure. The drums don't. If I over lengthen the bar from 4 to 8 measures I can again hear the music but it will cut out at the last measure again. I can scroll wheel through the audio at those spots so the audio is till there but it randomly cuts the audio. Is there a fix for this.? It only happens once every 8 projects and I have a 1tb upgraded HD.

Turning the master bpm back to sequence bpm fixed the audio cut out.