yes you are right - my first test file had extra artists. I can reproduce now and its fixed for the next update
Thanks, it's working better now, but not completely fixed yet. Once falling back to artist picture, it refuses to show movie backdrops for any tracks from the same artist.
Add one more track, track 3:
Title: track 1, Artist: John Williams, Genre: Soundtrack, Album: Jaws
Title: track 2, Artist: John Williams, Genre: Soundtrack, Album: Dracula
Title: track 3, Artist: John Williams, Genre: Soundtrack, Album: Queen
If you switch between track 1 and 2, movie backdrops are now changing accordingly thanks to the fix. Now play track 3, then it will show John Williams's artist picture because I made up the movie title. Then play track 1 or 2, and you will see it keeps showing John Williams's artist picture instead of switching to movie backdrops for those tracks. Try with v2.5, it's working properly.