There's an issue in the Nav Mesh because of how I made the cabin in probuilder. the bit bellow the door frame is seen as part of the wall so it can't be walked through by ghosts. However, the player can still walk through just fine.
Shown above is the front door hole, it is also effecting the door that leads to the kitchen.
I'm going to look for a work around by trying to cut the walls into different pieces so they can have different options in the nav mesh. If that fails I'm going to try modelling a door frame so that it can be raised above the floor and allow ghosts/demons to move over the blocked part.
17078601
commented
3 years ago 
There's an issue in the Nav Mesh because of how I made the cabin in probuilder. the bit bellow the door frame is seen as part of the wall so it can't be walked through by ghosts. However, the player can still walk through just fine.
Shown above is the front door hole, it is also effecting the door that leads to the kitchen.
I'm going to look for a work around by trying to cut the walls into different pieces so they can have different options in the nav mesh. If that fails I'm going to try modelling a door frame so that it can be raised above the floor and allow ghosts/demons to move over the blocked part.