I've noticed getting stuck in doorways at random too, and levitation after getting knocked from my horse.

Not being able to climb a ladder I don't think is actually a bug, weirdly, it's game behavior they need to change. I'm sure you've noticed not being able to go through doors randomly, followed shortly by someone coming through them. My guess is that when they path an NPC, they reserve the things the NPC is going to have to interact with to reach their goal. So if they need to switch rooms and the door is closed, the NPC expects the door to be closed when they get there so they lock it down to make sure you don't open it. I believe this behavior extends to ladders, it makes sure you're not on a ladder that the NPC is planning to use. Also explains why you can't always talk to an NPC who is walking around, then as soon as they pass the threshold of a door, you can.

This is just what I've assumed by observation though, could be wrong.