Amazon Unlimited music service issue

I have recently added a few more albums to my Amazon favourites. However when I try to play them the display in the app says I need Amazon Unlimited. I have Amazon Unlimited.
Some albums by the same artist play OK.
Does anyone see the same issue? Is it an Amazon or Arylic issue.
Thanks in advance.

Hi, Seems to be a bug somewhere.
I removed the albums from my library on Amazon and added again…they now play…