This is happening to me as well - constantly. Sometimes it's worse, and sometimes better. Just now I was hiding in a building in Chernarus for a few minutes because of an unusual high number of these phantom sounds. It wasn't until I realised the order of the sounds made no sense that I decided it was just the usual bug. Kind of a big issue since you can't ever be sure if what you hear is a potential danger or not. I experience this in every single game session without fail.
Not all sounds do this, but there's a certain few that are quite frequent:
- splitting stacks
- opening soda cans
- canteen drinking
- wet/dry food eating
- loading (less common but all the more scary)