Yeah, already checked the Game Mode and assist settings but nothing wrong there. Strange thing is that when the mission starts as soon as the cockpit appears and starts to zoom out to normal view, the rudder trim wheel spins all the way to the left. Happens in other P-51D and TF-51 ground startups too. Some scripting problem, maybe?
Next, going to disconnect controllers (TM T.16000M FCS) and try keyboard only. Then, reconnect controllers and delete all Joystick and Throttle commands and re-bind from scratch.