So after upgrading my home network, I had the option to hardware my Beam G2. Seemed like a no brainier, my WiFi was getting reasonably congested and wired is alway better when available. I also saw the option to disable WiFi, so of course I thought why not. 
 

I spend the next two days trying to figure why no audio was coming from the Sub Mini. My 2 rear One’s were working, and they are WiFi, so I didn’t consider it was the WiFi option I disabled. I re-added the sub and the app reported everything as being connected just fine. Eventually found out that it was disabling the WiFi that was the problem. I understand now that it requires a direct connection to the Beam (odd when the much older Ones don’t, but whatever) But not reporting/warning this when you do it, and saying the system is running and connected OK, is a massive oversight for such a usually polished experience.