VC Hotkey not working

I never usually have a problem with voice chat, but I noticed a bug in the game while playing last night that made playing with my team very hard. I have the voice chat hotkey assigned to a button on my mouse, and, for some reason, it registers as Crouch. I even tried reassigning it to a different button, but it either made the VC sound but with no possibility of communicating, or it just registers as Crouch. Is anyone else experiencing this?