Hi @User691981.
Thanks for reaching out and welcome to the community!
I’d be glad to assist and try to figure this out.
Sonos devices (except the Sonos Move) are designed to stay ON while plugged into power and it don’t have a power OFF button to shut down the speaker, it only enters an idle mode when not in use.
The music should continue to play unless a command to stop/pause was prompted from the controller or after as follows:
- An alarm was set with a duration
- The music played with a finite length (Album)
- Some music services offer this ‘timer’ feature that you can set to stop automatically after a certain time.
- Sonos no longer have access to the music source, or it’s no longer available for the player(s).
- The controller shuts down or loses internet connection.
It’s best if you can submit a diagnostic report the next time it happens, and reply with the confirmation number.
I'd start by reviewing your system and look at the logs/data, it can help us identify what causes to stop the music.
Let us know how it goes and if you have any other questions or concerns, feel free to reach out.
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