I would like to know if others experience this, I found out that sometimes after high damage received, I can still play and shoot people but I think other people actually see me dead.
In this situation I can still kill ennemies but they don't shoot back (I'm guessing they don't see me anymore), my name is greyed out on the scoreboard and when I type in the chat, it says * DEAD *.
I don't know what causes that, maybe the use of armor (light armor at the time I found that).
Also, this might explain some situations where being shot at without anything visible from that direction.
I don't know how often it happens, as it's not noticeable in the heat of combat, must check the scoreboard or type in the chat to see it.