I encounter this pretty often: when somebody is shooting at you and you try to hide behind a corner or just run away you will find yourself incapacitated after you are already behind cover and enemy has no possible way of hitting you. It looks like it has nothing to do with the ping.
Shooting through corners
kopyright
(kopyright)
#3
I can only imagine this is a latency problem, i.e. where you see yourself on your client vs. where the opponent sees you - and can still hit you - on theirs.