I checked and the NavMesh is not generated on the ocean, and “Can ever affect navigation” is already turned off, so I don’t think it’s that
There is NavMesh enabled on the grid base below however. I’m not sure why the AI would think to go there but, but I did disable that just in case for some reason the Guard got broken trying to get down to the grid floor? I suppose I’ll keep testing this room and update this thread again if this doesn’t fix it