Periodically I get a bug that prevents me from whispering or using group chat with other players. I can see their whispers, but when I whisper back I don't see anything. When grouped I can't see the group chat at all, neither theirs nor mine. The only way to communicate at all seems to be through zone chat or via mail. Unfortunately I don't know how to replicate this issue, and it seems to happen randomly, periodically and with no discernible pattern. If anyone else has encountered this problem please post your experience with it so that the developers can get as much information on it as possible, thanks.