This happens to us always. Sometimes we get lucky sometimes not. At the serpent, ppl just die due to this. Zenimax you need to look at it.
On my screen a person is behind me, on the other persons screen i am behind. Its eather lagg related(we all always have lagg) or its slow position updates between client and server.
This makes this mechanic luck dependend. Theres no place for luck in a game where you have leaderboards.
Here is a video about it to describe it visually.
http://youtu.be/e4efmlVFK1Q
I choose that music because i am sad bugs like this even exist.