Multidisc album artwork

[stefano_mbp]

Hi Simon,
I have a issue on some multidisc albums where DISCSUBTITLE is used.
In the album folder there are artwork for Album and for each DISCUBTITLE
I try to explain the issue:
I select the AlbumArtist
I have then, among others, the choice to go through "nn albums" folder or "Album" folder (renamed in Composition/Album).
If I go trough "nn albums" the artwork shown for the album is the right one (see green box)
   
If I go through "Album" (renamed in Composition/Album) the same album has the wrong artwork, it is one of the subtitles artwork (see red box)
   
If I drill down clicking on that album the artwork shown is the right one (green box)
   
Shouldn't the shown artwork be always the same?
thanks