Up until the September 28th update I had been living with the push back tug's front wheels doing either a"weeble-wobble" and/or being stuck in a hard turn position even through the tug would be going straight, and still occurring during the turn to face the nose of the plane either right or left. The weeble-wobble and the stuck "hard turn" occurs for the both styles of tugs at the wheels that are closest to the driver's cabin / chair.
I did the September 28th update and the problem seemed to have been fixed - no more weeble-wobble, no more hard turn of the wheels.
I then ran the October 1st update and the push-back tug started the weeble wobble and hard turn sequence again.
Hopefully this could be a quick fix??