Your username: AbductedSnake In which minigame/server does the bug occur: /fr Detailed description of bug: Screenshot explains itself.
I'm pretty sure that someone chatting in /fr is supposed to come after or before you do /friends. Not in the middle.
This was most likely because the message was sent at the same time as you typed /friends. I'm not sure if it's worth the effort of fixing for the impossibly rare times that this would happen.