after i've been beaten (yet again) in a match, these 2 chatless players have been chatting. with no chat my self, i did not understand anything. what's happening???
You have "block pvp enemy chat" enabled. This makes you unable to see your opponent's chat, which is why the no chat sign appears. After battle, you still see this sign (which is the real glitch here). You should turn the block pvp enemy chat thing off.