Since 1.68 we experience hearing movement sounds behind the player. Footsteps are played right at the player position, but walking through bushes playes the sound behind the player.
We have seen something like this mentioned in the 1.68 changelogs, but we never experienced this issue before that patch.
This is quite misleading, as one will always think there is an enemy behind you.
Occurs in 1.70, too.