I just created an account with this forum to complain about this. I do not want to mess with my computer hardware just to avoid this specific issue with this specific game. Other games detect the input in-use rather than connected. It gives players the ability to switch between keyboard/mouse and gamepad on the fly, and the UI will update accordingly. Why not this one?
If that isn't possible, then at least create a toggle for gamepad on/off so that the UI will only show the keyboard/mouse even when a gamepad is plugged in.