Hi @Sonoisbad, welcome to the Sonos Community!
I’m sorry to hear that you’re having issues with unexpected playback on your system.
This isn’t normal behaviour, with or without Spotify. When playback occurs on your system it needs to have a trigger, which could be through any of the following:
- An alarm.
- Direct Connect.
- AirPlay.
- A dropped player reconnecting to the network.
If you don’t have any alarms set, and nobody else in your household connects to your Play:3 (either through the Sonos app, Spotify Direct Connect, or AirPlay), then it is possible that a network issue could be causing this even if your other networked devices are running fine. If you can’t get Spotify to work on your system, to me that indicates a deeper issue.
The best way to tell what is causing this would be with a diagnostics, which I’d recommend generating within ten minutes of the issue occurring. This can show where the playback command came from and when. Once you’ve submitted a diagnostics, you’ll want to reach out to our support team. They have the necessary tools available to look into your system, see what’s causing this issue to occur, and resolve this with you.
