Btw Test Can Also come to first Floor Depending on How Much You break the game. But Once He's On the Second Floor His AI breaks and He Just Moves Randomly
It's Because His Nav mesh (Using Gmod Terms rn) Doesn't have any Movement Nodes on the first And Second Floor Due To Him Never Being Supposed To Be There In the first place. So He Either Moves Randomly Or Tries To Follow His 3rd Floor Nodes.