Same Issue in a Pictorial Pilot?
I had this exact same issue (AP turning on by itself, master disconnect working for a few seconds before AP engaging by itself again, AP trying to turn left) on an older Pictorial Pilot this week - it had sat for a few months, but was operating w/out issues previously.
I played around with the knob a bit, and it feels ok - I still have a good tactile response from clicking/looks like the clicks are registering. The display would change as well - decreasing from -1 to -90 while it's trying to turn left, and then miscellaneous F** codes (F43, F15,...). I can't find these anywhere in the manual, but has anyone else in the community seen something similar?