Ok, on my server, some players during pvp glitch and go to 0 hearts. All hearts on their hotbar disappear and the health over their head says 0 hearts. You can't hit them or /kill them. They can't be hurt and I don't know why this is happening. I'm on Spigot 1.8 Plugins: EDIT: Deleting their player file works until they get glitched again.