Monsters following through zone doorways

[superluser]

Well, that's mostly just the game's way of explaining why they don't follow you, I would like it very much if there were no doors that you could instantly be safe by going through, and that you had to evade them by hiding or running far enough away that they gave up looking, etc.

While that would be better from a storytelling point of view, it is nice from a gameplay point of view to have safe zones where you can regroup and think about what to do without forcing you to quit (and possibly to go back the last savepoint).