it is the case, that my spotify pauses between Tracks. This happens randomly. To Come into more Detail: a Track is playing. After it is over, the timeline moves over to the next track. the timeline shows that the next Song is playing, but it is not, nothing to hear. Ich can only push the pause button and push play again. Than I can hear the track again.
another possibility was, to activate crossfade between Songs, than the faliure did not occure.