I'm not sure if this would qualify as a bug or not, but I've noticed that when I shoot a gun in an area with zombies, the zombies run toward ME, not the source of the sound. For example, I was in Cherno near a guard booth. I shot a zombie then quickly ran into the guard booth and hid with 0 visibility and 0 noise, however the zombies that aggrod all knew exactly where I was and ran into the booth ~10 seconds after the shot. They were all out of LoS before I shot. My suggestion is to make the gunshot alert mechanic based on the location of the player at the moment they shot, but have that location stay fixed despite where the player may move. It's more realistic to be able to shoot and then run and hide while zombies swarm the area where you initially shot from trying to find the source of the noise.
