Bar doors push actors out of the world
In the latest nightly apparently it's possible to make NPCs get stuck in the ground with bar doors or get rid of them by closing it on them while they're in the way of the door (player character can fall out of the world too):
This doesn't happen with 0.46 as it pushes the actors if they get stuck in a bar door upwards or outwards the bar door to the top of the counter, the unstucking in 0.47 works alright for this case most of the time unless the actors are in front of the bar door in the center (always fall down if you close it on them while they're in that spot).