Hey, I'm working on a mod, but I keep running into some very strange things regarding one NPC's wander package.

Hey lives in a tower, and when he is supposed to be wandering in the bottom cell, if I walk into the tower, he falls from the ceiling (up three stories or so) and dies.

Does anyone know what is happening? Is it because I have him set to wander in a specific cell?

Any advice would be welcomed. Thanks in advance.

Check to make sure all the path nodes are on the actual ground, and that there is no door marker or anything else above the room.