Why doesn't the gampad work at lower resolutions in CommonUI?

Basically the gamepad works at 1080p, 720p and 640p but lower than that and it doesn’t work anymore. Why? Is there something I need to set up for it work in 480p for example?

The buttons don’t get focus when I move the gamepad. You can navigate fine between buttons in 1080p 720p 640p but set it lower and only one button or no button depending on the resolution gets selected. Even when a button gets focused on, it doesn’t receive any click input when in focus. With a mouse the buttons work fine and are all at the right place in the viewport but if you use a gamepad it doesn’t work.