Interesting observation, when I click from a “good” image to the “suspect” image, I see the image appear in the viewer briefly, and then it goes completely black. When I opened the file in Preview, is briefly showed the entire image and then about 90% of the image went black.
As reported earlier, if I open the image with Affinity Photo and then close Affinity Photo without developing or otherwise editing the image … I can click on the image in Raw Power and it is not all black anymore. Similarly, I can open it in Preview fine now as well. I surmise Apple Raw is creating a temporary working image and somehow that is what is being corrupted. Somehow, opening the image with Affinity Photo causes the temporary file to be invalidated or otherwise discarded by Apple Raw.