There is one thing that I'd like to ask, do the zombies get bored if you hide? I was sitting in a house with a Zombie Brute beating down the door and I guess the RNG gods had enough entertainment because he just up and left after a few in-game minutes, with me cowering in a small empty room with knife-spear at the ready.
Not a bug, but a recent change. We nerfed zombie scent ability, so they often can't smell you through doors now. If they can't see you and can't hear you, they will eventually forget where you are and wander off*. They don't wander in any particular direction, so unless you get really lucky that brute is going to stay in the area indefinitely, but at least he's not beating down the door.
Also doors are a lot tougher than they used to be, so unless it's a hulk or a pile of zombies**, a door has a decent chance of stopping them for long enough that they forget what they're doing.
*I'm a little surprised that the sound of pounding on the door isn't keeping the brute interested, maybe it only triggers on the destination being on the other side of the door. Either way, notabug.
**Multiple zombies trying to get through the same door now "pile on" and add their strength together for the purposes of smashing down the door.