If the TV soundbar ‘room’ is selected and in focus (top of the room selector) then the TV icon should show under ‘Your Sources’ - at least, that’s what I see here within the iOS Sonos App.

My NAS local music library shows permanently in the App - and I’m not having any issues with indexing.  What are the issues you’re seeing with indexing your library? - if there are some errors, then that might be the reason that your library display is intermittent. Have you tried a smaller ‘sample’ library that indexes okay to then see if the library under ‘Your Sources’ then stays visible/available?

If the issues persist then it maybe best to reproduce the issue(s) seen and immediately submit a Sonos system diagnostic report from within the Sonos App, note it’s reference and contact/chat with Sonos Support Staff via this LINK and see what the Staff can perhaps suggest to help you to resolve the matter.

@Ken_Griffiths -  Many thanks for your suggestions.   The Indexing issue is the same as many other people have reported in that the individual tracks of compilation albums appear are albums in their own right with the parent album title containing just that one track.

The music library issue has been reported to Sonos and I even have a ticket number but they did advise me that it is a known issue and gave me a ticket number but cannot tell me when it will be addressed.

I can now reliably see “Your Sources” where and when I expect to, but whether the Music Library is listed or not appears to be in the lap of the gods at present  For example, right at this minute I can use the Windows app to start a playlist on one of my speakers and then, by selecting that speaker in my iPhone app I can stop, start, skip or replay the tracks.  But “Your Sources” is not displayed in the app becasue the speaker is not in the romm where the TV is, and therefore my Music Library is not displayed as a source.  

Even on the days when the library is visible as a source I am unable to select anything using the iPhone or iPad apps.  I just get the dreaded “Somthing went wrong - please try later” message.  However, if I select “Settings / Manage system / Music Library / Detect Music Libray” it tles my that the music library is synced so who knows?

@essenby 
Strange as all my compilation albums show all of their tracks, which I’m able to load to a queue and play etc.  Sea attached example taken from my iPad Sonos controller - I’m just wondering if it’s perhaps a tagging issue? FWIW, In my use-case the ‘Album Artist’ tag field is set to ‘Various Artists’ and the Artist tag field has the name of the actual artist or band etc.

@Ken_Griffiths 

Not sure it can be a tagging issue because it’s the same library that displayed fine prior to “The upgrade”. And I’m not the only person with this issue as these pages will attest.

It’s a bit of strange one then? - I’m not sure why it works here for me? Admittedly, I thought the library issues around compilation albums had been fixed.

Anyhow, I sincerely hope the issue gets fixed for you (and any ‘others’) soon.

I have this problem since ages, since the random total app revamp, a simple thing i need to do, change my sonos 5 to line in, and it's impossible. The your source menu just doesn't appear. Rarely it does, very randomly . I am so angry.

Maybe an SSDP/mDNS discovery issue with your Five. Maybe reproduce the issue(s) seen and then immediately submit a Sonos system diagnostic report from within the Sonos App (with & without the line-in showing), note any references and contact/chat with Sonos Support Staff via this LINK and see what the Staff can perhaps suggest to help you to resolve the matter.

it was all working fine before the big app revamp. thanks for the tips, unfortunately it's far from reproducible, it's just random. I have my workaround through home assistant luckily.

Well it can be a variety of things on the local network or mobile device that can cause the issue - so it’s perhaps best to gather the diagnostic data and see if Sonos Support Staff can pinpoint the issue for you …and then go from there.

Before the app revamp, the menu to switch to line-in was in a fixed place, and you could always get to it. There was no way it could break, it was just there. Now it appears only on some conditions (why?!? if I have a sonos 5, I should always be able to get to it to switch to line in). Those new conditions are broken. I also tried to install the old app and it works (how could it break?!). I'll send app diagnostics and see what they say.

Sonos have changed things in terms of multicast device discovery of devices by the controller App so I suspect it’s that which is causing the issue in your case. See attached.

Personally speaking, I have multiple line-in sources from my players including a Sonos Port, Fives and Era 100/300 and they’re all present and showing 100% of the time as long as the multicast discovery of the player is working okay - so I suspect you have an intermittent issue with discovery. It can be caused by things running on your mobile, such as security software - VPN clients, site blockers etc. or it can be something on the network itself, such as WiFi extenders, EoP adapters, managed switches or a router setting. 

Hopefully the diagnostic reports will show something when you discuss the issue with Sonos Support. Hope you can get the issue resolved.

Well, despite my best efforts it would appear that Santa does not consider me a “good boy”.  After patiently waitng for the promised December release I eagley updated my iphone today but alas - still no sign of the “Your Sources option so still no access o my Music Library from my mobile device so its a miseable holiday period for me then.

It’s December 10, not December 31. 

And perhaps the issue required extra effort, and Sonos may not be able to hit your date (a great reason to not promise dates, in the software world), as one rarely knows in advance how difficult a problem is to fix, or any other issues that might come up that are deemed ‘more important’ by folks. 

Ah thanks Santa ha ha 

THanks for that ​@Ken_Griffiths - rub it in why don’t you

I’ve just checked again in case it has miraculously re-appeared but alas it had not.
(I even switched to Dark Mode icase it hwas hiding “white on white” LOL)

Ah sorry I didn’t mean to rub salt into your wounds here.

My own thoughts are that it’s perhaps not a Sonos App update that’s needed in this instance - it seems more likely that something is possibly awry with the local setup. I only say that though, because I have a circle of friends and family members who all use Sonos and like myself have a locally shared Ethernet-connected computer and/or NAS Box using SMBv2 (or higher) shared folders …and they are not having any issues with seeing/playing their local library in the ‘Your Sources’ area of the App and each one of us use a variety of Android/iOS phones/tablets between us and different routers/ISP’s too etc. The same can probably be said about the ‘line-in’ feature too - although some of my friends don’t use a line-in connection.

Unfortunately, these issues you mention can often be caused by a number of ‘other’ things, from mDNS ‘device discovery’, to incorrect sharing protocol, through to an issue with the local router, network configuration, or the mobile controller device.

Admittedly I’m a little surprised Sonos Support have not been able to help you get to the root cause of the issue (that’s assuming you’ve tried customer support?) - I just don’t think it will be an App update that will fix it.

That said  I’ll be more than happy to be proven wrong, if things are resolved for you with an App update and will perhaps be the first here aswell to wish you ‘A Very Merry Christmas/Happy Holidays’.

I hate finding myself on the tail end of these rolling releases, all the lucky folk are playing with their new toys while i’m hitting the update button every few hours and hoping my number is up.

​@Ken_Griffiths 
My Music Library was all fine and dandy and worling perfectly until a recent app update killed it (well after the May debacle), so I naturally suspect, and hope, another app update will restore it.   Sonos Support have confirmed that it is a “known issue for some users”, but obvopulsy not enough of us to warrant a high priority rating in the list of “things to be fixed”.

The local NAS library here shows in the App, even with the NAS powered off - so my thoughts it’s perhaps an issue with the indexing. How large is your local library? Have you ever tested things with a small library share only of a copied few artists/albums only to see if that works for you? Make sure you remove the original library before testing the smaller test sample.

My library is around 2TB and shows just fine.  My NAS never goes to sleep which I’m guessing helps keep Music Library showing.

the best way to assure compilation albums index correctly is to make sure the Album Artist tag is filled in with something like Various Artists.  I know, I know Sonos used to read compilation albums screwed up by Apple just fine, but not sure that will ever be fixed.  That’s why I’ll never use Apple to manage my music.

I use ‘Various Artist’ for compilation ‘Album Artist’ tag too, but I’ve been doing that as far back as I can remember, certainly ever since tagging my own local library, which is perhaps smaller than some 25,697 tracks, to be precise.

I think I can rule indexing out as the Library shows fine in the Windows Desktop app.   Also I can initiate indexing from the mobile devices and by watching the NAS traffic I can see “Sonos” accessing the tracks.  So the devices are able to see, and communicate with the NAS, and re-indexing from them does not inhibit, or mess up the view of the library on the desktop app.  There is just something that males the system think that there is no library there even when the system can index and control music that is being played from there!

I sincerely hope you do get it sorted. Perhaps let us know what happens.