I've noticed exactly the same yawing problem on the ground - the Otter is impossible to control unless the wind is directly from the front. Taxi crosswind and the plane yaws INTO the wind so it has nothing to do with engine torque. Using rudder pedals is useless - just touching the pedals makes the plane slide all over the place. Turning Autorudder back ON works but I don't have to do this for any other aircraft - just the Otter. Also much worse using Live Weather, but again only the Otter seems to be affected. BTW, I also have all piloting options at Hard.