I've had this issue since day one with the mkII but am only now getting around to trying a fix...
when I use the Cutoff / Pan 1 Knob, the value jumps around / is unstable, but generally moves with the direction of the knob (sometimes though, it has to be turned several times to just get it to respond in that direction). This occurs in all software (ableton and various VSTs including Analog Lab and V collection)
All other knobs work fine and I am using the 2nd-most recent USB MIDI drivers (latest update installing now)...though the issue has been there throughout with various driver updates.
I am really hoping this isn't a hardware issue!! Any help/ideas is very much appreciated!!!!