I'm having a bit of a problem with using Hamburg solo buses as AI in Spandau. It seems whenever they pull up to a bus stop they open the front door to let the passengers in, but then as they close the front door to depart, they open the rear door and just stand there indefinitely. I have encountered this problem with all the 3rd generation solo buses that I'd tried. This behaviour is not shared by articulated buses, they work fine (well, other than the usual OMSI problems associated with bendies). Ironically, if I enter the bus and close the rear door manually, it drives off as if nothing's happened (and then gets stuck on its next stop).
Darius, if you're reading this, could you share any insight? Is there a scripting limitation of some sorts that makes these buses unusable as AI in other maps? I don't recall them having any problems or getting stuck like this in Hamburg.