I've seen disappearing menubars and color glitches of the desktop in the top-right quadrant, this is on an external monitor connected to a 15" 2016 MacBook Pro.

I've seen disappearing menubars and color glitches of the desktop in the top-right quadrant, this is on an external monitor connected to a 15" 2016 MacBook Pro. It's not in public beta yet, and it shows.