I'm also having the exact same issue with a Nintndo Fight Pad Controller. It detects that I have it plugged in and when I go into the controls through settings, it shows a controller on screen when I hit any button. Furthermore the controls at the bottom screen show controller buttons. I also checked my controller in the devices and printer panel and ran a calibrate and tested that all the buttons are working as intended. Proving that my controller is perfectly healthy.
This issue does not occur with dinput controllers such as the PS4/3 controller.