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

Is it a wireless signal strength issue? Move one of the Node2's into closer proximity to the wireless access point/router and see if the behavior changes. If so, you might be able to get a wireless access point, or wireless router, with great range. Or you could look into a mesh network link the Linksys Velop.

However, before investing much time, or any money, move one or both of the nodes to see if it's just a matter of wireless signal strength.

Actually, I just bought a new NightHawk router for that reason plus a few others.   It could be a signal strength problem, I will check that tomorrow.

Hell, I have problems with my two Nodes dropping off as yours do, and I am totally Ethernet.  I doubt it’s your router.  

If you can't run a wire to the Nodes, here are a few things to look at:

- A better router
- A wireless repeater and/or Wireless Access Point
- Does your cable modem also have a wireless router?  If so, you might try turning it off.  If the devices connect to a different network than the one your PC is on, you won't "see" them.

I have two WAPs, one in my living room and one in my office and a repeater in my bedroom which is the furthest from my router and all my wireless devices stay connected.  My Comcast modem has a wireless router and I stay off that network.  There are speed test and network test apps you can run on your phone that will give you an idea of how good your wireless network is performing.