I have 8 sonos units (7 speakers and 1 sub) and don't have any issues.  Some of my units are on wifi and some are on my ethernet backhaul.  Have you updated your Sonos One to the latest firmware?   

Hello.  Wanted to see if anyone has any idea on my issue.  Had Boost set up completed, worked great, but range was not good on the wifi so we added Eero (3 of them) after the Boost setup was already done.  The new wifi has 2 signals, one 2G and one 5G.  WE can toggle the wifi signal in the Eero, but we still cannot access the Sonos app unless we are close to the actual router.  For some reason, Sonos app will not pick up the wifi from the Eeros.  I have the boost set up ethernet going into the wifi router, not the modem.  (modem ethernet goes to the wireless router, and we have port 1 output  ethernet going from the wireless router to the Eero and Port 2 output from the wireless router going to the sonos speaker as a boost setup.  Not sure what else to do.  

Thank you!   I will give it a try this weekend...  So I should just disconnect the ethernet cable from Sonos to the router to disable the Boost set up.  I assume I would need to do a factory reset on at least one Play 5 and set it up for Wireless...  My main issue is that the Sonos app will only operate if I'm within the range of the actual router.  I may have forgotten to state what my main problem was, and I'm sorry for that.  But, if I'm in close proximtiy of the Wireless router, everything works perfect.  When I go to the other side of the house (where there is an Eero), I'll have FULL Wifi signal on my phone, but I lose the Sonos App (it'll say can't find the Wifi) so then I lose control of the Sonos speakers.  With that said, I don't know if that will change what you suggested or not.  My apologies as I didn't explain the issue correctly.  So all speakers work, but the app drops when I get too far from the main wireless router.  For some reason my Sonos App/controller will not link up to the Eero SSID...  Hope that makes sense.  Please let me know if you think I should still try what you suggested, or if you think something could be the issue.  Thank you very much for your help!

I recently purchased a Sonos and connected it, a few days later my whole WiFi network is in tatters. The kids are upset their network drops while playing Fortnite and Minecraft. I keep dropping Zoom/Meet work calls, plus my android devices always show a not so strong signal. Any tips?

I need to amend my statement above.  I still had the patch cord between eero pro wired gateway and the Sonos device. When I remove the patch cord, I lose connection to the Sonos devices. So the patch cord stays.

I have 10 Sonos devices (mix of G1 and G2) in my home and 4 Eero Becons.  I am running the Sonos devices on the Eero network (W1 in the "about system").  While playing music, My Sonos devices cut in/out at seemingly random intervals - sometimes ranging from 5 to 10 minutes.  It happens across different Sonos devices at different intervals.  I've actually watched this behavior in the Eero app.  I think the Sonos devices are switching between beacons periodically.  Not sure why this is happening.  I previously was running Sonosnet and had the same issues (I connected one sonos device to a network switch that was wired to the primary Eero Beacon Gateway Router).  I thought maybe the Sonosnet was interfering with the Mesh Network, so I transitioned my Sonos equipment to the Mesh Network.  I am still having similar problems.  I've turned all devices on/off multiple times, and the problem still occurs.  Any thoughts?

I am wondering if this Eero network is not reliable.