I came across something different the other day. I was working on an image in PSCC using frequency separation to eliminate foot prints on a desert landscape (worked great) but when the image was saved to LR CC I noticed a strong magenta color cast in the shadows. This was not present when I went to Books nor when I took it back to PSCC to size for print. Has anyone else seen this? It seems to be happening since I upgraded to LR 10 and Big Sur on my iMac.