Can you wire one of your speakers to the Xfinity router and see if it makes a difference?
I will try, thank you. Could you explain why this might help long term connectivity stability? Curious. Appreciate your help
I think your instability problems are related to your Linksys mesh network. Wiring one speaker to your router creates SonosNet, a separate mesh network for your Sonos speakers. This will oftentimes improve network performance for all of your Sonos products.
After you connect one speaker to your router, it may take a few minutes for your other speakers to switch over to SonosNet. If you want to confirm that your speakers are in a “wired” setup, go to Settings > System > About My System and the bottom line of each device should read “WM: 0”. NOTE: Because the Move is a portable speaker, it will always say “WM: 1”.
Read more about a wired setup here:
https://support.sonos.com/s/article/3209?language=en_US