Pathfinding ignores any model with a humanoid?

I've been working on a game with loads of NPCs where they all use a pathfinding script that I made. I made it so if something gets in its path the path re-computes.

The only problem I've had is that the path completely ignores any model with a humanoid in it. I've performed a variety of tests to prove my theory. I put an NPC in the middle of the path. With the humanoid inside the model, the other NPC walks straight into it, and without the humanoid, the other NPC walks around the NPC. I did the same with a wall inside a model, and got the exact same results.

Any solutions to this problem would be much appreciated

Spacetimit