The selection is only successful when I convert the file to RGB.
I tried multiple adjustments with: tollarances, contuous, quick-mask, different layers. I also created a new files. Nothing works. The two grays colors are not selecable individually whend the file is in CMYK mode. As an aside The two grays are in the color gamut of the CMYK, one is a 15%K the other is a 15%C 15%M 15%Y
This was not an issue in the prior incarnations of Photoshop.
I need to be working in CMYK for the present production so if there are workarounds or preferences missunderstanding that I might not be aware of please let me know.
Looking forwared to any possible feedback on this issue.