Ghost TV

The regulars have not Factory Reset our systems in years — since we discovered it wastes time.

Obviously, I don’t understand what you are trying to accomplish and therefore cannot offer any useful advice.

To “extend the TV from one room to another” has no meaning within the Sonos lingo. That makes it hard to understand your problem. The fact you’ve already decided this is Sonos’ fault makes it harder to help you.

So you’ve grouped two systems, following this guide: https://support.sonos.com/en/article/group-and-ungroup-rooms

But a part of the group plays like it is set up as if it were surround speakers? That would indeed be strange - though not many people have this problem since I’ve not read about it here.

What do you mean by “turn everything off”? Do you pause playback or do you cut power?

How is the group function a flaw?  You do understand that groups and bonding speakers as surround speakers are not the same thing, right?

106rallye  

If you are watching TV in Room B (Kentucky Derby) and you want everyone to hear the race throughout the house.  You add Room A (Speakers) to everyone can hear the race, even though they do not see the TV.  So I extended the TV sound to the other room.

When the race is over I turn off the TV.  Everything is “Ungroup upon music”.    

However, when I try to play Music in Room A (at a later date)  The speakers only play sound sound not the main speakers anymore.   When I look at the app it shows line-in is a TV to Room A  and there is no TV in Room A.   

In your first post you say “I have purchased another 10+ devices in the past but upgraded them.  So needless to say I know my Sonos.” 

Will you please, using Sonos terminology, describe your basic rooms setup? What speaker(s) are in Room A, Room B, etc? You say “You add Room A (Speakers) to everyone can hear the race, even though they do not see the TV.  So I extended the TV sound to the other room.” Do you group Room A with Room B? There’s no “add” or “extend” in Sonos terminology, other than adding them as bonded surrounds or adding them to a group. Are you doing one of these, or what?

I Grouped the rooms together not add more speakers to the room.

I am busy for the next 2 weeks before I have the time to factory reset all of my Sonos players.  

What is, or where in the app settings is, “Ungroup upon music”? 
 

If I understand you correctly:

Room B speaker is set to TV audio;

You group Room A so it too is playing TV audio;

You turn off the TV so nothing plays to Room A or Room B (but they are still set to play TV audio).

If you then want to play music to Room A, you Choose room A in the app, then select your music source - ITunes, Sonos Radio, Amazon music or whatever. Then the speaker(s) in Room A should play the selected source. Room B is still set to TV audio, but the tv is still turned off so there’s nothing playing through the speakers in that room.  You can then group Room B to share Room A audio, but need to do the grouping to hear music in Room B.)

Is that what you’re doing? At what point does that sequence fail? What error messages do you get?

You mention “When I look at the app it shows line-in is a TV”. Do you have a soundbar, or are you using a speaker with an aux (line-in) connection?

Sound bar and ungroup on autoplay

No errors 

You seem reluctant to fully answer my questions and my attempts to clarify and understand what you’re doing and experiencing. 
 

I can group rooms, to listen to the tv audio from my lounge in my kitchen too, and I can then play music in the kitchen the following day. No power downs, no factory resets, so the app doesn’t seem to be at fault despite what you have implied earlier.

I wish you luck in resolving your issue, but as you won’t help me to try to help you, I’ll bow out and see if anyone else will try to help. 

I also wonder whether this is the reason others are also quiet in this thread? 

I will just repeat what’s already been said: factory resets will rarely resolve problems, but it will delete any data that might help Sonos support understand the problem.