I ahve an NPC who has been following me around as I explore a lab, but for some reason when I try to explore one of the levels she inexplicably teleports around. She doesn’t have any bionics or item that would allow that. Think it might be related to line of sight somehow, as she usually teleports and reappears when I break line of sight with her. For isntance, if she’s ahead of me in the dark - say she’s on guard mode - and I move into a light area - killing my dark vision, and moving her out of line of sight, then when I exit the light she has suddenly appeared behind me, on the complete opposite side of the room. There is nowhere near enough time for her to have gotten there more naturally. Bit of an issue if I’m trying to keep the NPC useful.
Also, as far as I can tell, I have no effects that would cause hallucinations of the like.