A few weeks ago I my imported playlists (from Itunes) would appear empty on spotify in my iphone, after a while or closing the app would make the songs appear again.
But since a week ago or so the playlists are always empty, I have reinstalled the app on the phone, I have deleted the playlists and imported them again from itunes, etc. and nothing seems to work. When I open spotify in my Mac the playlists are full of songs, so there's no problem there.
It's pretty annoying since my itunes playlists are the main thing I listen to and basically the reason I use spotify