Selection Loses Color Info when dragged
When dragging a selection to a target background, the original selection loses color information and and becomes muddy, flat and loses contrast, saturation, everything. By playing with the color and hue sliders in the new document, I can get a little color back, but nowhere near the original. Everything is using the same color space, but still this happens every time. I'm usually pretty good with treoubleshooting PS, but this one has me baffled. Using current versions of the software and MacOS on a Mac Pro desktop.
Does anyone have any thoughts? Thanks in advance.

