I can give you more informations, the problem is with the manipulators in the cockpit, the right side pullout works correctly.
In the cockpit, when I press the HDG button on the AP, the auto pilote drive both heading and pitch, the yoke do not move any more when I move my device, and the plane drive on the HDG selected with the bug and continue going up. I try press the HDG button with the pitch on 0 but it is the same.
Tell me if you want more informations.
Thank you for your investigations.