DGR1 - I tried disabling smart connect and moving Sonos to the 2.4 ghz network. I had my phone on 2.4, but it did not work. In addition after I disabled it, my smart lights and plugs stopped working too.  I reverted back.  It might have been impacted by the boost on the network?  
 

Since you didn’t respond to my remark about AP/bridge mode I guess you haven’t selected that mode for the XT8s.

In that case if you’re going to use the Boost at all it needs to be plugged into the main XT8 node. Don’t plug it into any ‘hub’ (switch, I assume) upstream of the XT8 or into the Fios box itself.

But, as noted, you’d probably be better off dispensing with the Boost entirely and connecting your Sonos system to the XT8’s SSID(s).

I did not make any adjustments for the A/P Bridge mode in the XT8.  I apologize for the confusion.  Just to clarify, i did plug the Sonos Boost into the XT8, I did not plug the sonos boost into the verizon router/ hub that brings the signal into the house.  I worked with Verizon to turn off wireless networking capabilities in the Verizon router / hub before installing the ASUS System. 

Could this be the route cause of the problem? 

It sounds like the Verizon unit could be in modem mode then. In that case we’re back to square one. Have you actually tried running the Sonos on the XT8 WiFi instead of using the Boost?

First, I double checked that the ASUS device and the operation mode is set to Router not A/P Bridge Mode. 

I removed the boost and the Sonos System appears to be working.  However, when I move from Family Room (Beam, and Play 1 L R) to Kitchen (Sonos One) Spotify song skips forward a song when it goes to the kitchen speaker.  The Sonos App shows the previous song playing the Family Room, but no sound.  

Is this something that can be corrected or just live with it?  

Are you moving the music, or are you moving yourself? Is this when controlled direct from the Spotify app or with the Sonos app?

I am using the Sonos App, but have my Spotify account linked to it.  I am moving the music and from one speaker to another speaker when this happens.  

Try with a different source and see if you get a track skip. Also between different pairs of speakers.

When the first (or only) room in any group is changed the stream has to hand off between ‘Group Coordinator’ devices, the new one reconnects to the source, buffers need to recharge, etc. Sometimes it can glitch.

You could also look in the Sonos app to check the connection strength and which node each speaker is connected to. If it seems like a poor one has been chosen then reboot the speaker. As noted above I find that binding devices in the ASUS UI is the surest way to guarantee results.

I am not familiar with binding devices.   Are you saying to change the range of the DHCP address, so there is a group of static addresses and they never change? 

Most routers have the ability to reserve an IP address to a single MAC address, so the device with that MAC will always get assigned that IP, and that IP will never be assigned to any other device.  Check your router manual for more details.