[Combat Hitboxes]
It seems that hitboxes of both parties "freeze" when a zed commits to an attack on a player. So if I dodge an attack and then try to counter-attack, I'll miss completely. Meanwhile, the zed can follow up attacks on my old position and keep hitting me.
It can get bad enough that just running through a town for long enough can result in a zed comboing the shit out of you out of sight, so you cannot see what's attacking you, and from where. It's a death sentence.
[Interaction Hitboxes]
Sometimes I cannot get the F prompt to interact with things. But way more often, I get the F prompt, but it does nothing. This includes fixed location items like doors. Doors are a common culprit. Occasionally the door interaction hitbox is just a foot off or so, so if I stand in the right spot, I can have my F and interact with it too.