Offline playback on Samsung Edge 3 not working

[seht97]

So a couple of months ago I bought the S3 Frontier watch for running purposes and installed Spotify right away. I downloaded my playlist and went out. In offline mode it plays the same song, no matter what song I pick, and it plays that song for about 5 seconds and then stops. Then I'm unable to start the music for about 10 seconds. Then I try another song, but the same song just replays and bugs out.

[seht97]

Edit: Samsung Gear S3, not 'Edge'. My mistake!