Unfortunately, it still does not work.
I have a playlist with 2 songs in it, Flute by NewWorldSound and Louder by Spinnin' Records. Louder appears, but Flute, even with multiple deletes and re-adds, will not show up. I have the latest version and the latest iOS.
EDIT: It seems like all songs by Martin Garrix will not show either. Maybe some songs by artists do not show up?