pampiermole

I'm running the latest version of the plane. I have some connection problems with the autopilot. Yesterday I had a flight and could only connect ap2, but not ap1. Now I'm in cruise (just a normal, stable, regular flight) and for some reason the autopilot disconnects a few times. I was away from the pc and found my plane at 12.000ft and turning around. There was no input from the joystick or rudder. This happened 3 times on my current flight. So, what could be the cause of this? Something I did wrong?