Controller breaks the game UI

[GQuadri]

The first time I played on PC with my controller plugged in.
All the UI references controller buttons, even if I start playing with mouse and keyboard.
I said, no big deal, I'll just ask my friends which key does what, but then I discovered that I can't move my mouse at all inside menus.

Then I tried to disconnect the controller and start the game, but the UI still only references the controller buttons and is affected by the same problems, as if the controller was still plugged in.
You cannot interact with the pause menu at all, which means you need to press alt+f4 to quit the game