iOS14 upgrade - S1 app not working

Ok, it works one day.

currently no Connection via App 

App reinstall, reboot iPhone … Connection via App works again.  But this is not smart 

That’s not an issue with your app, it is an issue with your network. Try unplugging all Sonos devices from power, then reboot your router. Once the router comes back up, and give it a minute, only then plug back in your Sonos devices. 

I’m having this same issue. - right after I updated to iOS14.  Can’t connect to Sonos.  Tried almost all of the suggestions.  Is there going to be a fix for this?

Same - I still have this problem. S1 app on an iPad running iOS13.7 finds the system fine. S1 app on an iPhone 8+ that’s just been updated to iOS14 can’t find anything. I’ve checked the local network toggle that was already On and toggled it back and forth, no difference. I’ve deleted and reinstalled the app. I’ve restarted the phone. 

Is this workaround the production version IOS14 update for S1?

I have nearly 20 Sonos devices running via a boost connected to a 6 node Linksys Velop mesh network.

Post IOS14 - in addition to having just spend 3 hours manually resetting and reattaching every Device to the Boost network, the local access functionality workaround accessing the mesh network directly has created chaos. The mesh network dynamically manages load profile to the individual nodes and in turn the Sonos speakers now. This has created constant drop outs right across the network as the mesh network reallocates the load.

Can I raise a ticket to have this remediated please?

Again.. no Connection. 
also with iOS 14.1 

Hi folks, thanks for reaching out and welcome to the new users here in the community. Just to let you know that after enabling Local Network Privacy for the Sonos S1 app, it should perfectly work as the same with other apps in iOS devices. 

Upon opening the S1 App for the first time after updating to iOS 14 you will be prompted to enable "LocalNetworkPrivacy" for the Sonos App:

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If you deny this permission, you will be met with the system not found.

After allowing the Sonos S1 and still experiences system not found, then it’s a different problem. Continue to troubleshoot 'System Not Found' as normal.

Just let us know. We and the community are always here to help.

Just as a secondary note, Sonos will not work with any Apple Beta iOS versions.

Ok tried more stuff and got it to work.  One of the things I did was to check with my interest service provide home page.  I use AT&T and they have a website where I can manage my internet (like the name and password, setting up guest network, etc).  It can also show what devices are connected to the internet.  So when I checked, none of my sonos devices showed up as being connected to my network.  For some reason it looked like when I upgraded to iOS14 it reset or kicked my sonos devices off the internet and wasn’t connecting back up automatically?  Weird.  Anyway, I did a restart of my network from the website.  It took a few minutes to shut down and restart (and honestly I am not sure if this is the same as unplugging the router or not) but after the restart it showed the sonos devices back and then I was able to reconnect to my sonos app on my phone.  Not sure this will work for everyone, seems like there are other issues too, but worth a try.