Thank you for the feedback, maybe its because of the interpolation. There will be a offical release of 4.4.0 soon but thats without the interpolation. It also seems that the interolation is not complete.
Just keep an eye on:
https://github.com/dborth/snes9xgx/releases
Just keep an eye on:
https://github.com/dborth/snes9xgx/releases