Sonicorbiter 2.5 operating system

Hello folks,
I have installed/upgraded to version 2.5 from 2.3 and I can no longer play music from my Roon Server on my Mac with MacOS 10.12.5 on the Roon app on iOS 10.3.2 on my iDevice.

When I reinstated 2.3 everything works OK. I have Roon Ready Diagnostics from both versions of the Sonicorbiter OS [dumped as HTML files]. Asking this forum if they have any similar experience successfully running 2.5 wired into a set of KEF wireless LS50s ?

I’ve spent the past day ensuring everything is the same on both Sonicorbiter setups insofar as I can. I have also rebooted software (Roon, MacOs) hardware (routers, idevices, etc.) - troubleshot to the nth basically - but to no avail. I can see the full 2.5 suite of apps etc so there’s no issue with visibility. So I’m stuck.