There is that weird bug which it's not always happening but it is very annoying and the players lose a lot of faction power The bug is that when a player dies they respawn at the death point and the other player can kill him all over again Picture : http://prnt.sc/f41zh2
This can be due to an anticheat teleporting the player, believing they're hacking. This could also be a type of mod on a hacked client, to trigger an anticheat on death, so a player can be 'invincible'
I would enable any debug mode (if at all) within your anti-cheat. This should print things to your logs about what flags are being fired upon death. This may lead you onto a path to what features you need to disable within your anti-cheat to fix this.