Spotify, I think you have a major problem. Lately, since a week or 3, both on my iPhone 4 (iOS7) and Ipod touch 4th Gen the tracks of my downloaded playlists, when being offline, stop playing after an undefined time. They skip to the next track but no audio can be heard. 

Only when I do a "hard" skip myself to a next song, that song starts playing and audio can be heard. Again for 3, 4, 5 or more minutes until the same occurs.

I'm a happy premium user for more than a year now (correction: I was a happy premium user) and this really p***** me off very much.

I have done all that I could find on the community threads on this subject such as:

- clear history and cookies,

- delete the app

- turn off iphone or ipod

- turn it back on 

- reinstall the app

- put the preferred playlists offline again

....

I'm a bit lost and it seems that you cannot manage to provide a solution to this terrible issue.

Any idea ?