Purchased album missing from Music library on Mac mini

Mac Mini MacOs Tahoe 26.5.1 Music 1.6.5.10

I have lost(?) a purchased album from my library but cannot retrieve it.

When I look for the album in the iTunes store it displays as 'Purchased' but when I selected the Purchased option to download it again the album does not appear in the purchased list.

Am I missing something, appears to be a 'Catch 22' situation so any help gratefully received!