Ethernet is always preferred if connected, so you're speakers are using ethernet when set to auto.
Regarding the disconnections of Spotify the PLC connection could be the cause. I can recommend a reboot or a factory reset and new setup if the problem still persist.
You can use Bubble UPnP or another UPnP app to stream Tidal to your speakers. That's what I would recommend, you'll get lossless streaming and high resolution audio. If your speakers don't support AirPlay your Dialog might. With the latest 2.12.5 software, AirPlay 2 should be enabled. You should be able to enable AirPlay in the web interface if you have it. Enter the ip address of your speaker in a browser and choose the AirPlay tab.
Regarding the disconnections of Spotify the PLC connection could be the cause. I can recommend a reboot or a factory reset and new setup if the problem still persist.
You can use Bubble UPnP or another UPnP app to stream Tidal to your speakers. That's what I would recommend, you'll get lossless streaming and high resolution audio. If your speakers don't support AirPlay your Dialog might. With the latest 2.12.5 software, AirPlay 2 should be enabled. You should be able to enable AirPlay in the web interface if you have it. Enter the ip address of your speaker in a browser and choose the AirPlay tab.
Living room: Kii Three/BXT with Control.
Den: Tannoy Precision 8 iDP with TS112 iDP subwoofer.
In the cupboard, waiting for a sibling: 1st gen. Phantom Silver running DOS1
My Phantom Voyage
Den: Tannoy Precision 8 iDP with TS112 iDP subwoofer.
In the cupboard, waiting for a sibling: 1st gen. Phantom Silver running DOS1
My Phantom Voyage