AI require pushback in SU10 beta

In testing out traffic beta in SU10 we have noticed a change in behavior as
follows. AI (passive traffic) now require a physical tug in order to push
back. If the ground vehicles slider is set to 0, AI will request pushback but
never move. Previously in SU9 the aircraft would pushback without the vehicle.
Can you confirm this change and if it may impact smaller airports that don’t
have tugs?

Bug reported in the MSFS Forum as well:
turned-off/530285/79) I guess it is not an SDK issue, but a core game related