Spotify Connect - jams on HAMA DIT2000

[Horequarius]

From laptop, or phone, or tablet playing Spotify and connecting to the digital tuner Hama DIT2000 it works ok for a while. Then suddenly the music stops playing, although it continues on the phone, laptop, tablet. So you can't push the playbutton on your phone, because Spotify is correctly playing overthere. Only a hard reset for the HAMA DIT2000 releases the Spotify-app from jamming. The display tells me otherwise "Push Play"...... 

Who knows this problem and who knows the solution?