When stealth killing zombies with knives and doing the neck stab animation "takedown". If you sneak up behind the zombie in crouch with your knife and perform the action. once the action is done you player remains standing and must be once again manually be put into the crouch position.
beyond this being really annoying im unsure if this is intended or not because there are other actions in the game that make you stand but then immediately return you to crouch once they are completed.
either way i was hoping you would reconsider this if it isnt a bug because it kind of annoying to be sneaking around and then after a takedown just be standing around and not immediately be put into the crouch after it is done. letting all the zombies see and kind of destroying the point of trying to stealth.