This seems to be a newly introduced bug in version 778:
On the artist Page and on Discography of an Artist, when you limit view to “Library only”, then only “Main Albums” are shown but no longer appearances of that artist on other albums. This used to be the case until yesterday. Since 778, these “Appearances” albums are all gone. There should be 4 Appearances listed here:
Yes, thats the entire point of the discussion But not as Main artist. He is “just” an “Appearance” in 4 other sets. And he appeared there until I updated. Thats why I took him as an example as I recently looked at him.
Just going thru other artist. The problem is all over the place…
Yep, I made that second album “Main” as he sings virtually all of it
But all those other sets, Matthew Passion, Christmas Oratorio etc, he’s “only” a member of 4 soloists. But of course I’d still like to see those when I look for him! Their in my library for a reason after all…
Something is odd about all that. As @bbrip with Carlos Mena, I yesterday listened to an album with Bernarda Fink. By her I had a few albums in my library, but all being Main Albums. So, today I added the Concerto Köln production of Händel’s Giulio Cesare to my library. On the screenshot from the Home page it shows as the most recently added album:
Bernarda Fink is definitely credited on this album:
Now, going to Bernarda Fink’s artist page, on the ‘Overview’ tab I get her eight Main Albums in my library, but as has been observed by others, her appearance on the recently added Giulio Cesare-album doesn’t show up.
Now, on the Discography tab there’s a hint why this may be so:
The recently added album is clearly shown on the ‘With René Jacobs’ section, but it isn’t identified as being part of the library. On the Home page it is clearly shown as having been added to the library, but here, on Bernarda Fink’s Discography page, the album isn’t being identified as being part of my library. So, of course on the Overview tab it wouldn’t show up as an Appearance of hers…
On my example, all albums are by Tidal, with the default credits as supplied by Tidal/Roon. Be that as it may, I would expect a recently added album to be correctly identified as such when looking at an artist’s Discography.
As shown on the following screenshot, on the artist’s Main Albums section of her Discography, the albums added to my library are clearly marked. But not so the recently added album where she is credited as ‘With René Jacobs’…
I have a feeling that Roon doesn’t correctly identify on all relevant pages and views all items that are part of one’s library.
(Smoke me a kipper, I'll be back for breakfast!)
Unfortunately I do have to agree with the OP on this one, tested it a couple of times and as soon as I select library albums only then the appearance selection disappears entirely.
And this was on some symphonic rock artists of uncommon flavour!
Quite annoying I would agree.
See pictures, in this instance there was only 1 appearance but it went bye bye.
I’ll give another example. I yesterday added to my library two albums by Gunar Letzbor’s Ars Antiqua Austria. On both albums on the right, Ars Antiqua Austria is credited as main artist, and Gunar Letzbor as conductor:
So, if I restrict the Discography to ‘Library only’, of course the Appearances section disappears, as the albums are not being identified as being part of my library. I think the root problem here is that Roon doesn’t consistently recognize albums or items which are part of one’s library.