Question about enemy behavior

[FragdaddyXXL]

Ah, I see now. Some patrol nodes around the door and the rest of the room. And near that door, they have an area that despawns it when it enters it. It looks like a risky setup, seeing as the monster spawns in it. I would be afraid of it deciding to turn around and re-enter it. But, going by where the player is when it's triggered, it looks to be safe.