Problems with Bluesound Vault and PC app finding Node2 that are wireless

I have the 2i and haven't had any problems with connections or updates. SMB  is the file sharing  protocol they use which has been around since the 1980's and is still widely used in small networks. 

the players should be ungrouped before update

Actually, the update should be smart enough to ungroup the players, update them, then regroup what it found originally.   To me, this seems like an obvious common sense thing to do.

As for my system, the recent 1.6 upgrade made the Nodes disappear from the network again.    So, I am doing the reboot, reboot, reboot thing until they reappear.

Spatial

Did you do the update from usb drives, Ethernet, or WiFi?
That’s really discouraging.

I did my update via Wifi.
I needed to reset one of my Nodes-due to them being grouped, and then it accepted the update. No problem with them disappearing. 
Only Spotify gives me trouble-but now that I got a Quobuz trial, I might just go back to the free version. Too bad, as I like the 'Discovery' tab. It always offers great selections that I wouldn't have thought of.
B

I upgraded from Ethernet and I was able to get the system up and running on the third reboot.   At least I didn't have to reboot my PC this time.  

I believe the catch here is starting Roon on the PC after the reboot and the Node and Vault has logged onto the network.  Roon looks for players at boot up but I don't believe it looks for them afterwards.    Maybe it does and it just doesn't work on my system.  

I normally leaving Roon running in the background all the time so it is easy to log on with my cell phone and control the system from there.    The PC is at the other end of the house, so trying to work the system from that is not practical.   Next time there is an update, I will close Roon on the PC, do the update, then reboot the Node and Vault, then restart Roon and see it that works the first time. 

Clearly, Digital Audio via Computer is still uncharted territory.