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Maintain play order

Hitting NEXT on UP NEXT song does not properly skip track when using an ordered playlist.
Here's a Basic example (Playlist with songs in order 1,2,3,4,5, etc):

Now playing song:
'Song 1'

Up Next:
'Song 2'

Hit NEXT to cycle UP NEXT song to Song 3 (to bypass 'Song 2')
When 'Song 1' finishes (or is advanced), 'Song 3' plays next, but 'Song 2' now appears in UP NEXT again. Expect result here would be to see 'Song 4' and onward.

(If Song 2 is allowed to play, Song 4 will become the 'up next' track)
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