I often hear from players that stealth don't work. I don't know why but I don't have any problem with it. since T3 to T5, all my POI are made in stealth and no zombie move (except the one set to jumpscare or some room that zombie are hidden on roof without hole to see them, but if I sneak back enough, I can kill it/them without wake up the next ones). Just finish hospital this evening, only one z wake up by mistake of me. I notice a thing, when I enter a large room, no red dot are showed but by looking around they are here. (by the way; I think you all do it but, I remove all things on floor, using no armor, insane difficulty, only 3 in stealth and slow progression, so, dunno why it won't works on several players)