I just found out this game analog control is broken in the City, on mapped buttons, touchscreen control/onscreen is fine (not sure about real joystick analogs).
Well, I think it's a minor bug (idk it's the game or ppsspp's), only happens inside the City, in combat and overworld maps control seems okay.
Note: The game has two control modes (or three if unmounted control counted), City controls which is stuck with default, and Overworld/Mission control which can be configured in the Options menu.