If I narrow a search on the artist ‘discography’ page to ‘my library’ I get a different result to the artist ‘overview’ page ‘Albums in my library’ - see screenshots below. It seems ‘compilations’ are not included on the overview page - but then again when the ‘discography page’ library button is clicked again it pulls some of the ‘compilations’ (wrongly tagged as compilations anyway) up from the list below where they were? Just to add to the ;strange behaviour’ list! 
I really don’t see the benefit of an overview tab which doesn’t show all albums in my collection and those on Tidal / Qobuz. It seems a bit of a mess imho. Roon 1.7 was far more logical presentation in the Artist page.