It seems that when using the Volumio as UPNP renderer and the BubbleUPNP as controller, I cannot adjust the volume of the Volumio player. When I switch to my other UPNP renderer, the volume control works just fine. When Volumio is the renderer, it shows that the volume is muted in the BubbleUPNP but the player plays just fine.
Does anybody have the same issue, and how can I “unmute” and enable volume control over UPNP ?
I run the latest Volumio at a RaspberryPi3