I would love to hear some info on this. I'm on my third MB2 (traded one, sold one, just bought another, I keep coming back!) and each one has had the sequencer pattern issue. It happened 3 or 4 times with my second one and within 30 minutes of turning on my third one, brand new. Easy enough to right the wrong with the hard reset (does this revert the firmware version? I haven't checked) but it's frustrating to have to lose my sequences and to even have to deal with in the first place.
I can't figure out what causes it to go haywire but I'll try to keep an eye on what's going on when it undoubtedly happens again.
It would be nice to know if it's at least being investigated.