Same problem, appeared 3 or 4 days ago. Everything goes as planned in Squad Battles and any other offline mode, but when I try to play Rush or Rivals - input method automatically switches to keyboard, and I can't switch it back while in-game. In the meantime game still responds to gamepad - I can enter pause menu, navigate through, change settings & etc., but I can't control my players. Again, problem exists only in competitive online modes. In example, Squad Battles vs AI goes well even if i play it online co-op with my friend, but if we try to go for Rush mode - I'm stuck with my keyboard again.
Windows 10, controller is an X-Box gamepad. Any suggestions?
