Can't use "C", "V", and "H" in game.

My "C", "V", and "H" keys on my keyboard do not work in game. I'm not able to type with these keys in chat or use them as keybinds on my hotbar. I can, however, use these keys in any other program, meaning this is not a hardware issue.

I have tried relogging, and even tried restarting the client completely. Nothing has worked so far.

This started happening after the most recent maintenance this morning. The keys were working just fine before that.