Wont play some songs.

[Cobbyco]

A problem has just started in Spotify on my iPhone with certain songs in playlists.

I have them selected for offline and they all have the green circle with the arrow in but some of them just won't play. They look like they are playing as they appear in the 'Now Playing' view but the time bar won 't move and there is no sound. They won't play when I have a wi if connection either.

Any thoughts?

Thx