Happens after clicking the +, just get the loading animation where the heart should be. This is on MPB M1 latest macOS. Without the heart I can’t add a new tag.
Same happened to me but I found that although the scrolling continued, the album was added to my library. I ignored it and just moved onto another page.
Thanks for the advice. I was on trial but cancelled before my subscription started, too many bugs/quarks and it was frustrating. I’ll give it another go in a few months. Cheers.