Loss of system in app

If you want to fix the the problem you are facing the difficult problem of being sure it isn't your local network and the Sonos devices having the issue.

If you are willing to entertain other possibilities you could power down all Sonos, reboot the router and once stable power up the Sonos devices.

If frustrates folks like you, and me, when support or the app blames your network. The issue in cases like yours is almost always an issue with the way Sonos uses your network which is different than most other clients. If the interaction got the blame there would,be far less pushback.

Hi 

Thanks for your reply and advise. 

Okay, I will power the speakers  down and reboot the network. 

I will have to do this in the morning, as the network is being used streaming etc. 

I think the reboot will solve the gremlins.

See what happens, I deleted my app and reinstalled, rebooted the phone to no avail as well. 

If the network refresh works for a while but you see issues again, particularly after a power failure or update consider using DHCP reserved addresses for all Sonos. Once assigned do another network refresh to activate them.

The reservations aren't a cure-all but do address a known class of Sonos issues. If they don't work at least that hard to diagnose issue is off the table when you continue troubleshooting.

Hi, 

This morning, I powered off the sonos speakers and soundbar, left them 'off' for 5 mins, & powered back on.

The speakers/system were then seen by the app, as i rejoined again without issue, which of course I'm very happy about, all the settings /playlist etc within sonos have been preserved too. 

I didn't need to reboot the network as the issue has been resolved, and to be fair,  I've never had any types of issues that some folk experience with their networks that make them tear their hair out, as i use good modern equipment.

Plus, all my speakers/network, and anything of value in the home have their own mains power conditioners to smooth the power, plus surge protection as UK power networks are awfully noisy, goodness knows why the system wasn't detected by the app and played up? Maybe, hopefully this was  just a one off and I don't have to use DHCP reservations for all Sonos however it's an option to do if things go strange again. 

Thank you, for your help, it's very much appreciated. 

Cost and quality don't seem to be key to the DHCP assignment issues, different DHCP server software may be.

Folks using the latest dnsmasq (spelling?) don't seem to have issues due to the stable way it assigns addresses, the ISC DHCP server does seem to trigger the issue. Much more research needed to have a firm answer.

For most it is likely faster to try the reservations than to try to find out which server is running. Changing servers is probably difficult to impossible on most routers.

My router uses up to date  dnsmasq service to hand out ip addresses.  You're probably right more research needs to be conducted.

I guess sonos support ticket queue is 90% WiFi /router related.

I'm putting my issue down to a random glitch, first in 6months, powering down the sonos system was the best solution, thankfully didn't need to look at  router pit of vipers problems.