First of all thank you for making recalbox, it is splendorous.
But when I quit a game and return to the menu this is how my display looks (I can listen to the music).
There is also some distortion in some places of the screen as you can see in the bars (look behind the white bar), in other emus I think this happens somewhere else randomly. It is difficult to see but it is actually there.
I am using custom overscan to fit the actual screen size.
Thank you and sorry for my english.