While finishing tutorial for feeding cows I managed to get my game saved so that whenever I load it up, my Claas Axion with attached feeder trolley gets jumping and the combination ends up upside down. I can remover the trolley, but most of the time Axion still ends up staying upside down. The trolley goes on to jump to the edge of the world, never stopping.

If I load up the game and immediately press the key to release the attached equipment, I might get Axion to stay on it's wheels (while the feeding trolley gets on, following its ballistic route).

I believe I got this happening when driving full speed to the ending point of mission for buying & feeding cattle and saving the game while not having the tractor on full stop.