Control problem

[LunaMoo]

PPSSPP default mapping will fit most popular xinput and dinput gamepads, but can't really work with everything out of the box since not every gamepad follow same standards.

Just go to Controls->Control mapping where you can clear all default controls and set it to whatever fits the gamepad you have. If you started by setting custom mapping, but without replacing or removing default ones then that could be your problem to begin with.

If it continues to be a problem, you can also access test analogs screen there which shows what buttons PPSSPP detects you're pressing which might be useful in providing information what's actually happening as some devices are just weird and there's too much variety on pc's to really guarantee everything working for everyone.