I’ve got an iPega 9025, and it’s working without any issues. I can map every key/action to any gamepad button.
Only thing I can think of atm: the dpad and both analog sticks are supported, but not all of them at once. The analog stick is recognized as dpad, so it’s possible to override a previous dpad configuration by configuring the analog stick afterwards.
Or do you perhaps have some sort of gamepad control app that needs to be configured?