[CLIENT] Club chat rooms display incorrectly

All club chat rooms display summoner icons of the message sender in very strange ways, taking up the entire chat box, and most (but not all) message text is replaced by gray boxes. Regular chat between players displays correctly, but all of my clubs show this visual bug that makes it impossible to read anything.

How to reproduce:

1. Log in
2. Open chat
3. View any club chat

EDIT: I had viewed missions prior to opening any chat box, then unchecked "show completed missions", then checked the box again, then closed missions and opened chat, when the bug displayed. Relogging seems to fix the problem and I was unable to duplicate it doing the exact same steps in 4 tries. So it could just be a one-off thing, but I'm guessing it's not supposed to happen at all so i figured I'd report it.