No that's not a big problem. I have an XP80 and haven't noticed this. I speculate Dani
doesn't have enough experience with Roland XPs. Ofcourse I don't know him so can't say for sure. I haven't heard talk about this problem in my users group. I know though, that when I try to switch track/parts while still recording, that will screw up my drum track. Ya gotta stop recording to switch tracks/parts.