Hello,
Audiophonics Kit with PI-3, Sabre-V3, and OLED. All works very well with Ethernet, including music selection and OLED display. When set up with WiFi only, OLED stops displaying music selection information, and eventually displays „good bye“ and goes blank. Music continues to play and will allow selection changes, OLED continues to be blank. Change back to Ethernet and all works as it should.
The display probably works with a player ID, which is changed when you switch from Ethernet to Wifi. I would suggest looking in the OLED display config to see if there is a MAC address or IP somewhere.