Arma 3 - McCoy has no hex tag

Playing some Arma 3 Invade and Annex when some player had no tag so when in doubt I shoot. There are a couple players that this seems to happen for me and they get all bent. If I knew if it was only me then I would try to fix it but it seems that they don't want to communicate so I can figure it out. I guess no one else was having that problem. He left the game with only 10 kills and 13 deaths.