(wow i did a lot of grammar errors)
Why does the teams empty message still work?

You should probably report that as a bug by going to the Bug Reports forum thread.
You should probably report that as a bug by going to the Bug Reports forum thread.
Some people might know that if you simply type /all in chat in a teams game and send it, everyone gets a message like this:
(Player name): (Everyone):
and thats the whole message that appears, now it looks false if you never have seen someone do it, it is only possible in teams mode, sodont attemptto replicate it in ffa, unless it id diplomacy mode, whaere /r, /b, /g and /y can do it as well.
https://www.chess.com/variants/4-player-chess/game/27230997/3/2
this match has aninstance of anempty message.