I'm not sure if you would call it a bug, but one thing I noticed by accident on the PC Version was this:
If a controller is disconnected or the battery dies whilst in gameplay, it brings up a prompt that says: The Active User has disconnected their controller. Please reconnect or go back to the title screen to switch to a new user. Then it has a prompt for you to press the X button on your gamepad. (This prompt disappears when the pad is reconnected)
But the game does not let you go back to the main menu via the mouse and/or keyboard, and the only option you have is to reconnect the controller, which removes the prompt anyway thus negating the X button prompt.