Thanks for providing us with that info. We've passed it on to the right people.
Lastly, could you send us the link from which you downloaded the album?
This file has been tested on 3 different computers and current version of spotify. It no longer sees the album.
Thanks for your patience on this and for providing us with all the necessary info.
We reached out to our tech team about this, but unfortunately this is not something that they were able to reproduce on their end.
Since this is happening on multiple devices using the same account, the last thing to try would be to create a new account, upgrade to Premium and see if the issue persists there.
If this solves it, then you can reach out to our Customer Support team here, who can help you move all your content to the new account and then close your old one.
Let us know how it goes! We'll be here in case you have any other questions.