Chat/Commands deleted when game minimized

Whenever I'm typing something in chat, whether it be a command or just talking with others, whenever I minimize the game to do other things halfway through a message, the entire message deletes itself when I go back to the game. I don't know if this is intentional or not, but it's really annoying when I'm writing a long command, minimize the game to change my music or something like that, and come back to the entire command being deleted and having to rewrite it.