When using the healing brush or spot healing brush, adjacent to a selection's edge, have the healing brush only sample the pixels on the active side of the selection.

When using the healing brush or spot healing brush and you are working on the edge of a selection, the sampling considers all pixels in the surrounding area. When you are making a selection to work on (eg: a light sky against a dark mountain) and want to do some healing in the sky, on the edge of the selection, the dark mountain will “contaminate” the healing of the light sky. 

It would be nice if it would only consider the pixels in the active selection, and not the pixels on the other side of selection line.

Right now I must find other ways to heal on the edge of a selection.