This seems to have been addresses a couple of versions ago, but it actually caused this issue. For most people that I have talked to, this issue was not present before it has been addressed.
As of today, some footstep sounds are played behind the player, which makes it sound like someone is chasing you. Especially on Tanoa this can be easily reproduced while running through the jungle. Can upload a video if needed.
Saw this ticket here which the same report, which has been closed due to inactivity, but problem is present as of today in vanilla Arma.