This bug happened to my friend, then to me. Sit in one place for ~10 minutes, maybe a little less. I was miving a bit from time to time, but you better sit still (and lie down, my friend was sitting, but to be sure just lie). So after some time sounds of flies like above decayed body will start. Not sure if this for player only or on serv aswell, but this kills ambushes, which are already dead because there is no proper caliber/rifle for long range sniping (only x8 scope but with a singe scope you can't kill much you know) but still, don't beat what's already dead, this is a bad tone.

Happened on official 1st person DE4187