Hi @rcrh 

Thanks for your post!

Please have a look at this thread: 

Is it a similar situation, or do your surrounds stop playing when they’re missing from the app?

Winner winner chicken dinner!

This is exactly my situation but instead of unisntalling the app I reconfigured it by deleting my sub & Play1s and reattaching them.  Rebooting my router every couple of weeks because of Sonos is a pain I don’t want to go through.  But I’ll try uninstalling the app and reinstalling it.  

Thanks Corry for the link.

Hi @rcrh 

I used to work in casinos - I hated that phrase, but it just made me laugh so I guess I’m over it!

You’re very welcome!

Reinstalling the app didn’t fix the problem for the poster of the linked thread -  it just highlighted the likely cause of the problem to yours truly.

If a reboot is needed every couple of weeks, I’d get a new router - especially if you’re using one supplied by your Internet Service Provider. A third party router worth about £$€60 will do a far better job than any free router. I’d recommend this only after consulting with our technical support team, however, who might be able to find something in the router’s settings that will fix the problem. You might find that a reboot of your current router will fix the issue at least for a few months - this is what I’d expect.

All routers that cost less than about £$€1,000 will need rebooted a couple times a year to ensure good performance and reliability, though many may work for years without issue. Router’s run on software which runs on an operating system, just like a computer (because it is one), and if all the software isn’t perfect, problems (like memory leaks) can build up over time.

Well, when I consider that

1. this problem happens right after a software update, and 

2. this problem is resolved by reinstalling the software, and ​​​​​​​​​​​​​​
3. I’m already using a very expensive third party router

I think I’ll keep my money in my pocket and just hope that sonos doesn’t screw up the app too often.

Thanks for your help with the link

1. is likely an issue with duplicate IP addresses, so reserving for your Sonos devices, and frankly all your network devices would be wise. Note that often this “fixes” itself after the lease for each device is renewed, but can be a lingering issue depending on how long your router is set to do that process. Any speaker with a bad IP address will show up as a ? in your list of speakers. 
2. Also points to a) as you’re reassigning IP addresses in that process.
3. What router? There are known issues with a few, which have threads (Asus and British Telecom come to mind, but mesh devices are occasionally troublesome if not configured properly). Sonos also has a FAQ somewhere around here with a list of known problems (and potential solutions) with certain routers. 

If the issue happens after Sonos updates, then perhaps try reserving your Sonos device IP addresses in your routers DHCP reservation table.

edit: ah I see Bruce beat me to it here. Reserving IP addresses should help.

For me I have assigned individual and fixed IP address to every single one of my SONOS gears… This strange situation happens only after the current update, and only on my Android phone. I can see everything normally on my iPad Mini. The HT setup work perfectly fine but just missing from the app and showed the suggestions for me to add the SUB and surrounds… So I just wonder if there’s something wrong with the app instead? 

Why not submit a diagnostic, and post the number here, so the Sonos reps can see hard data, then. Bugs can be extraordinarily hard to track down with only anecdotal data, and if they don’t have that Hard diagnostic data, and can’t reproduce the bug, they’ll assume it’s something on your side of things. Give them proof of the issue, not just a descriptive post. 

May do this next time… because when I’ve encountered this problem, I will uninstall and reinstall the app immediately because I know this can fix the problem… at least at that moment. 

I will reboot my router tonight and see how it goes. Thanks!

@rcrh Why would it be a bother to reboot (not reset) your router?

Hi @rcrh 

Is this issue still happening? If so, I recommend you get in touch with our technical support team, who have tools at their disposal that will allow them to give you advice specific to your Sonos system and what it reports.