Oh yeah and btw it also looks like the "source" of artist picture name is the "song artists" when it should be "album artist" imo.
I strongly disagree with that.
If it has to be changed it should be an option.
Myself, i use my own local artists pictures since years, and it's set according to song artists.
Even on my Android app it's like that.
And btw, it's far more logical to be set according to song rather than album, when you have numerous albums with the "various" album artist tag.