I can start a Daily MIx on my Denon Heos system using Spotify Connect.
But when I first start a normail playlist (which works fine after the latest Denon Heos update), and then try to switch to a daily mix, this will not work. My speakers stay silent. When I switch to my iPhone I do hear music. Back to Heos speaker: silent.
Switching to a normal playlist: Fine, msuic again