Ever since I updated my Spotify to the new darker user interface (which was sometime last week), the playlists that I toggle to "available offline" have stopped downloading their contents to my iPhone's (4S) local storage. Suffice, to say, this renders the playlists mostly unlistenable when I'm not on wifi, because the songs keep stopping for data transfer. I should mention that I have a good 1.7 gb of available space on the phone, so that can't be causing the issue. Has anyone else experienced this or found a solution?