Gamepad won't work when set to X-input, all buttons ignored

I just bought a new gamepad: Trust GXT 540 Yula. Upon plugging it in the device is detected and lights up accordingly. The issue I seem to be having is it refuses to work under Xinput mode: It will only function properly when the switch is flipped to Dinput. The device is detected in both cases but under X-input the buttons are simply ignored and no actions are registered (neither any buttons nor moving the thumb pads). I can use it fine under D input for now... however since I hear X input is the more modern and correct system, I was wondering if this is a known issue and what could be causing it.

My Linux distro is the KDE version of Manjaro OS. Kernel 5.13.5. X11 Plasma session, not using Wayland yet due to its issues with monitor standby.