"Your Sonos System Not Found" after it was already connected and playing

My Sonos system has recently developed an issue that I haven't seen before. Living room: 2 x Play 1s and sub. Kitchen: 1 x Play 1. Right Play 1 of the stereo pair connected to router via Ethernet cable. IPad and iPhone controllers on the same wi-if network. On several occasions recently I've used the play/pause hardware button on either the living room or kitchen speakers to play music. However, when opening the controller app to change the music source, it can't find my Sonos system even when both rooms are playing music. This behaviour is seen on both iPad and iPhone.

My Sonos system has recently developed an issue that I haven't seen before. Living room: 2 x Play 1s and sub. Kitchen: 1 x Play 1. Right Play 1 of the stereo pair connected to router via Ethernet cable. IPad and iPhone controllers on the same wi-if network. On several occasions recently I've used the play/pause hardware button on either the living room or kitchen speakers to play music. However, when opening the controller app to change the music source, it can't find my Sonos system even when both rooms are playing music. This behaviour is seen on both iPad and iPhone.

Please try the full reset procedure in my post above

In spite of fully resetting the system, iPad Air 2 is still showing intermittent issues with connecting to Sonos speakers. The Play/Pause hardware buttons on all speakers are working fine. On a couple of occasions, the Controller will find the Sonos speakers after being left open for around 10 minutes. Interesting that another poster on Windows 10 is experiencing similar issues:
https://en.community.sonos.com/ask-a-question-228987/windows-10-several-minutes-to-find-sonos-system-6735461

In spite of fully resetting the system, iPad Air 2 is still showing intermittent issues with connecting to Sonos speakers. The Play/Pause hardware buttons on all speakers are working fine. On a couple of occasions, the Controller will find the Sonos speakers after being left open for around 10 minutes. Interesting that another poster on Windows 10 is experiencing similar issues:
https://en.community.sonos.com/ask-a-question-228987/windows-10-several-minutes-to-find-sonos-system-6735461

We'd love to look into this further. Can you send a diagnostic from your Windows 10 controller after it's found the players?

This problem sounds like an issue with the security software on the PC or something wrong with the windows network configuration. Do you run any firewall or anti-virus software on your computer? Also, can you check what the network profile is set at? It should be Private or Home, not Public. I'm going to reach out to that other thread as well, if he's experiencing exactly the same problem you are, it'd be best to continue over there. You can add your diagnostic confirmation on to that thread.

I'll submit diagnostic on the other thread. FYI, controller is on an iPad Air 2 with the latest version of iOS. No firewall or anti-virus! Network profile is Home.

Thanks testcard, I pulled up the diagnostic from the other thread. Since you're not seeing this issue on a Windows10 computer, just the iPad and iPhone. Might as well keep these threads separate. My apologies on before, I somehow read your comment to say that you also had the Win10 trouble.

Does rebooting the router resolve the connection trouble with the iPhone or iPad? Even temporarily. If it does, I'd recommend giving us a call on our support line. A technician can assist further investigating the system live.

I have similar problems. Diagnostics number is 5525821.

I've had many issues keeping my apps connected to my SONOS setup, and I've redone the whole setup about 10 times now since i bought it last month.

I have a wireless setup, no BOOST device. All is working fine now thank the gods, and as we speak the SONOS is playing some radio station.
On the iPAD the SONOS APP is connected to the device, but my PC SONOS Application cannot find the SONOS. But I'm sure it is connected!
I can see the SONOS on my wireless router, with IP address 192.168.1.4.

I would love to just be able to point the application to the bloody IP address... Shouldn't be that difficult, should it? 😠

Is your PC wired to the router? Some routers won't forward discovery broadcasts between the wired and wireless segments. Sonos relies on these to locate the players. And before you ask, this is entirely compliant with the UPnP standards. Some routers simply don't play ball.

I have to say that having a wired component -- a BRIDGE or BOOST -- would probably solve your problems.

Sonos is fantastic until it is not Biggest upset was the day of a huge family get together, and NO Sonos. My daughter connected her Iphone to something and that was all we had, so annoying, no music is just NOT GOOD!!

I have bridges and boosters, one day Sonos was perfect and then it disappeared. This has been happening for years, however for over the past month it has completely disappeared