I also know what you mean by bots homing in on you. I did a raid on lab and stood at the Hangar Gate extract and just kept shooting enemies as they came walking in through the doors. There was a massive pile of bodies by the time I decided to extract.
Maybe that could be a feature request? A toggle to disable that bots home in on your location if they hear shots. I like that they use more tactics during firefights, but it would be nice if every raid didn't play out the same way with bots homing in you the moment you fire your first shot.
The problem is they seem to record the location of your last loud sound with pinpoint accuracy in 3D, even when they are engaged in a firefight on the other side of the map. Not only is their distant hearing too accurate, they are able to pick out an individuals sounds and if they are a 'hostile/scav' or not.
It is possible to crouch walk at the slowest speed to a new spot, but we really shouldn't have to go to these lengths to get away, particularly when bots are actively busy with much closer sounds or multiple sounds at once. I don't think they are affected at all by sound masking which means if you're not using the slowest crouch walk, they hear everything regardless of the situation.