Works as intended I guess. If I want to manipulate color I use the brush. BUT, when saving the picture in a file format which doesn't support alpha it should n

Works as intended I guess. If I want to manipulate color I use the brush. BUT, when saving the picture in a file format which doesn't support alpha it should not fall back to the color information by default but instead use white (or grey etc.), if not defined otherwise. And I think that's what Adobe PS is doing? I believe that's the actual problem if there is any.