Not a GSX problem or related to GSX. As you can see, the airplane moves BEFORE GSX asked a direction, so GSX pushback hasn't even started yet.
It seems that, for some reason, the DEFAULT Pushback system started, either by you, or by another add-on, or by the AI co-pilot, and it's fighting against the fact GSX has already "frozen" the airplane because it must do that with a wheel-raising tug. Try to find why the default pushback started.