I have 2 UPNP renderers on my network. A Naim MuSo and a pair Devialet Phantoms w/ Dialog
I can see the Naim MuSo in Audirvana but not the Phantoms. It used to work until I upgraded to the latest version of Audirvana.
Audirvana Mac Version 3.5.24 (3554)
Debug info only show 1 UPNP player found.
I can see, and play to, the Phantom UPNP player in 2 other apps on the same mac