Being agressive, AI just using pathfinding.
I discovered that in training mission when i can escape from the guard through the hole in the wall, so guard start chasing me. When he ran out of the room i crawled in, but then he returned. This makes escape from an aggressive enemy impossible if a hiding place is available for AI.
I expected him to use last known position or to call someone to intercept, but not just run to my current position with maximum efficiency.