This may be related to how you have entered the Album Artist names, or the difference between selecting Artist vs Album Artist. I cannot say if anything has changed specifically for this in the newest release, but it is working fine for me.
I have an album by Jim Reeves & Patsy Cline which is labeled exactly like that (with the &), even though it is not really a duet album. I used to have it tagged as two individual artists, but with "Jim Reeves & Patsy Cline" as the Album Artist. When entered like that, the album would not show up under either person if I was selecting ALBUM Artist, but would show up under either of them if I just selected Artist.
I changed the Album Artist field to be "Jim Reeves; Patsy Cline", exactly like the Artist field (note the ; making it two different album artists, not the combined &), and now the same album shows up when I select either Album Artist.