Why don't Album Booklets open in Apple Music

I have been away from my iTunes/Music for a while. After the recent updates, I have just noticed that all the digital album booklets no longer open in (Apple) Music anymore. They are PDFs just as the ones that have been purchased from iTunes. For example Pink Floyd's "The Wall" with all the iTunes digital features. None of them work. If I try and open each digital booklet, the first track of the album starts to play; in some cases, a totally random track from anywhere in my album collection opens and starts to play. Why is this? Will it be restored? Does anyone else have this irritating problem? I have gone through a lot of trouble to recreate the booklets of each album I have — I don't want all this effort, plus the purchased album digital booklets lost.