First of all, I apologize if this is not the right section, but as this is about a particular game, a particular core and a possible configuration issue, I was not sure where to put it.
I have Nestopia as my NES emulator in Retroarch. All zapper games work perfectly without additional setup just by plugin the mouse: Duck Hunt, Hogans Alley and Freedom Force play flawlessly with no issues. But Operation Wolf behaves oddly, the crosshair shows and moves ok, but the gunshots seem to appear randomly all over the screen instead of where the crosshair is.
Has anybody noticed this behavior? is it a configuration problem? Is this a specific issue of this game? I have tried with all No-Intro versions of the ROM and they all have it.