the beat, sound and pattern is totally weird, yes. I have found out the cause of it. Have a look to the MIDI data of your “Main 3” clip. There are A#0 note events. Those events will trigger the “Hihat Shank” Instrument and (!) the “Fill 6” Pattern of Groove Agent. You need to activate an own MIDI Port for the PATTERN section (P Button) to avoid to trigger the pattern section with the beat.
… that’s a bug, yes. Will fixed in the next update.
Where you able to replicate the patter not giving any sound issue?
Try playing the track in a loop and hit the Stop(), wait for a while (minimum 2 sec) and then hit play () and see if you can replicate the issue.