Hi @RAWC 

Welcome to the Sonos Community!

I’m sorry to hear of this new issue you are experiencing, and I would like to look into it for you.

Lets try and prevent it from happening first - please unplug your Beam from power for a few seconds, then plug it back in and wait for the white light to stop flashing before using.

If the Beam switches source by itself again after that, please submit a support diagnostic before switching Beam back to TV input and reply here letting me know you have done so, and I’ll be happy to take a look for you. Please don’t share the given number here. Thanks. Once the diagnostics have been submitted, switch back to the TV’s audio.

I hope this helps.

Hi Corry,

Thanks for getting back to me, I have been out of the house for about an hour and left the system on, when I came in the same issue has occurred and the source input has switched from TV to Music Library.  I’ve submitted diagnostic as you suggested , here is the reference number **************, appreciate any help you can give.  Thanks, Andrew 

Moderator edit: diagnostics number recorded and removed

Hi Corry,

If it’s any assistance the system has just done the same thing again, if have run a further diagnostic the reference being **************.

thanks again

Moderator edit: diagnostics number recorded and removed

Hi there any suggestions, thanks 

Hi @RAWC 

Thanks. Things are making more sense to me now - I understood the Beam to be playing music, but I now understand it is just showing the last-played music in the queue, as TV input does not replace the queue.

Your Beam seems to be having an issue with it’s memory, and is rebooting it’s software as a result. When it does this, it forgets that it was playing TV, and the Now Playing screen will show what was last queued-up (but doesn’t play it - correct?).

As the Beam is your only Sonos product, please be aware that what we need to do to try to resolve this will result in a loss of any saved favourites and playlists, and of your services - in fact, your Sonos system will need to be set up from scratch.

Please perform the following steps:

1. Open the Sonos app and go to User icon » App Preferences » Reset App » Reset. The app will exit.
2. Factory reset the Beam by following the instructions on our Factory reset your Sonos product help page exactly. You should end up with a flashing green light on the Beam.
3. Next, please open the Sonos app, skip past the introduction and opt to set up a new Sonos system. You can use your existing Sonos account to do so.
4. The app should find the Beam and set it up for you - please complete all setup steps.

Hopefully, the Beam will now behave - if it does not, I recommend that you get in touch with our technical support team to look into your replacement options. I suggest you point the agent you speak to to this thread to avoid repeating any steps.

I hope this helps.