Strange Terrain/Character Bug Discovered

Recently I was playing on the Mythical unturned server on Washington and I noticed I could see the outline of a player running behind a hill. I haven’t encountered anything like it in my 3k+ hours but I will try to see if I can recreate it in a completely vanilla lobby. You have to look closely to see it but if you follow my crosshairs you can see a character shaped “fog” moving behind the hill. Even though its difficult to notice it seems like a pretty game-breaking bug in terms of PvP. Here’s the clip (if this is worthy of a Debug Beret I will be so happy).