mixer track. and also the song mode is glitchy at times. For example, when i highlight and try to move the patterns few blocks over , it starts flickering and wont move. this issue hasnt been fixed since flstudio 12 ...
in case anyone was getting unsynced, draggy tracks etc.–UAD was the culprit for me–meaning flstudio doesn't bounce correctly/compensate whatever. deactivating UAD is workaround ...