When you are dead in a group, you cant do anything... You can't type. you cant go to menu, nothing! You cant even leave the game if the rest of the players are afk, and you are dead and cant respawn, the game blocks you from doing anything at all.
Let players go to the menu, settings, maps or simply game menu so you could leave group or game. Or let them see the chat and let them type. Dont know how it could get like this...