It crashes each time. No log is generated.
Because THIS is another, completely different crash, which is not related in any way to the fixes posted here. I CAN replicate one case, which is selecting "Operate Stairs/Jetways" and then Refueling, so this will be of course investigated, because it's very strange.
I can't replicate any problems with Pushback so, please, make a report of the precise, exact, sequence of operations you did in GSX, the airplane used, and the type of gate (Apron, Gate or Walk-in)