Why aren't my iTunes imported CDs uploading to iCloud Music Library?

Hi

I am having issues with my iCloud Music Library. I imported some CDs onto my local iTunes library (on windows PC) yesterday and normally they then upload to the iCloud Library, for me to access on iPhone/iPod. However, several of the albums added to iTunes did not and have not uploaded to the iCloud library.

I have restarted iTunes and the PC, turned on and off the iCloud Library on both the PC and iPhone, and removed and re-added the albums that won't upload. I have ran diagnostics with no problems and checked for updates (none available). I have also NOT reached the 100,000 song limit for iTunes match.

Not sure what to do.

[Re-Titled by Moderator]