I'm getting a very odd behaviour in my Skywalker's (with Pixhawk and APM:Plane 3.3.0) RUDDER . While in Manual Mode it responds correctly to the transmitter's input, in other modes managed by APM (Stabilize, FBWA, etc.) not only does it move in the wrong direction but it also bounces along the movement. The video explains this oddity better than words:
Do you guys have any clue on what's going on?
Thanks very much!