This is happening to me now. I have little kids and it freaks them out everytime. I have an Android device and use Spotify and it happens randomly when I use my phone and switch between apps. I need this fixed asap.

Just had the same issue, using Spotify so definitely linked.

I opened the sonos app to submit the diagnostics, and that stopped playback restarted then kicked the volume to 100%

On the Move the max volume is mental so not ideal!!

And please add my voice to the chorus: starting earlier this week (around October 21, 2019), my Sonos started suddenly maxing out the volume at unpredictable intervals.  My partner and I sleep while playing a Spotify white noise playlist overnight.  Three times this week the volume suddenly zoomed up.  When this happened last, it was literally in the middle of the night -- we were not using our phones, we were not fiddling with controls, we had no apps open, we were not sending any voice commands (our system is linked with Google assistant).  Needless to say, it was a traumatic experience to be woken up in the middle of the night by an ear-puncturing blast of white noise!

To the best of my knowledge, we have not changed anything in our system recently: no changes to set-up, no addition of speakers.  I haven’t been following closely if there have been recent changes to the iOS or Android apps.  

I have a Beam in my living room and a stereo pair of Ones in my kitchen. This happened to me again last night while making dinner. It’s probably the fourth or fifth time since I set up my system that the volume maxed out. I got my system about a month an a half ago. I’m using Spotify but I might switch to Apple Music since this seems to be a Spotify issue. Has anyone had this happen with Apple Music?

Scott

I didn't have this problem over the weekend but I didn't use my Sonos very much. I did set volume limits to 60% as a work around. This is very annoying and if it isn't fixed I will probably switch to Apple Misic. 

I contacted Spotify and they just told me to delete my app and reinstall. Not very helpful, I had just done that after wiping my iPhone and iPad. 

I am having a similar problem playing Spotify to my 2x IKEA Sonos speakers (grouped) from my iPad and pc with volume normalisation between tracks - it’s very random but I will set volume at 50% and the next song will drop volume to 30%, so I turn it up then the next song will blast at 80% and so on. 
 

I have tried all the suggestions I’ve seen. Control volume thru Spotify, disable hardware/lock screen controls etc to no avail.

Same thing happening to me.  I think it’s triggered when my phone restarts the Spotify app from the background.  It’s an older phone running Android 6 Marshmallow and for whatever reason, as of earlier this year it will close out Spotify when the phone display shuts off and then restart it when I wake it up.  That’s annoying itself, but the volume blasting problem only started happening in the last few weeks.  I have to bolt up from wherever I am and literally run to hit the pause button on one of the units. 

I unplugged my two Play 5s and plugged them back in, made sure both Spotify and Sonos were updated on both my phone and laptop, but for now I’m avoiding the Spotify app when playing on the Sonos because it feels like one of my ears that’s pretty close to the speaker when I sit at my desk has diminished hearing like when you go to a concert without earplugs….  Max volume seems like just an annoyance but it’s actually a health risk, please try to address ASAP!

Hello

I have the same problem here since some weeks.

The Spotify app is changing Sonos volume.

This was not happening before.

I filed also an issue on Spotify community here but no answer yet:

https://community.spotify.com/t5/Android/Android-volume-High-on-Spotify-Connect-and-Sonos/td-p/4848566

Had the same issue when using Spotify Connect to control my Sonos. Seemed to happen when Spotify had lost the connection to Sonos (maybe the app having been put to sleep by Android to save battery) and then reconnected.

I set up volume limits to 25-30%, and so far it does not seem to have happened again.

I've started getting it this past 2 weeks on my phone when using Spotify and either my beam or play 1.

I've had it happen when going back into the Spotify application as well as when I've been using another.

Just done a little test where the apixation had been background for 15 minutes, switched applications back to it and the volume switcher in the Spotify application jumped to max and then back down to where it was before visually but the volume didn't change.

Android version 9.  Patch PPWS29.116-20-11 from 1st September 2019.

Spotify app version 8.5.30.579 installed 29th October.

Perhaps try logging out and back into your Sonos Controller(s) in Settings/Accounts and do the same for the Spotify Service in Settings/Services and see if that perhaps fixes the issue. 

For what it's worth, it keeps happening to me too. I've not been able to work out any pattern, but it is quite frustrating. 

Same happening with my system. Submitted diagnostic to Sonos. 

Has happened now last two nights at nidmight. Playing from Spotify but not through the app. Using alexa to start the music on Sonos so don't think it has anything to do with mobile apps more the Sonos / Spotify service. 

Terrifying when this happens and it happens to me all too often.  Random.  I may not even be in the room.  For god’s sake don’t leave the room with it playing unless you live alone and in the country or you may very well be living alone soon enough.

PLEASE ESCALATE!

When you submit a diagnostic, you must contact Sonos and give the reference #, either in this thread or directly.  A diagnostic without a reference # is going to be ignored. 

+1. It started happening about 10 days ago, give or take. This is especially irritating as a week earlier I told the neighbour off for blasting music REALLY loud during the day. Then I suddenly found myself blasting music at super high volume (Play:1s might be small but boy they’re powerful) around midnight. (You’d be surprised how shocking it can be when Enya suddenly ROARS at you...) It’s been happening during the day as well. I just started this account, because the volume jumped up twice during one song. (Not Enya’s. )

Streaming from Spotify, of course, via Spotify Connect. I’m so glad there is a volume limit in the Sonos app, now when it jumps to 100% it’s actually 25%.

I like the advice someone got given by Spotify, to delete the app. I think I might do exactly that.

Same here. Happened a couple of times with my Samsung Tab S3. I am concerned that this will damage my Sono speakers. So loud. All the way to the max randomly.

I signed up to Spotify today and am getting the same issue referred to above when playing from Spotify, not from the Sonos app. Mine is jumping to around 50%, not great when the kids are in bed. Will be monitoring this thread. 

It would be helpful if users would submit a Diagnostic immediately after one of these events, then post the confirmation number here.

Done. 1275438742

Took about 20 minutes from pressing play to the volume jumping up. I’ve got the max level set to 20% or something, so it won’t show in diagnostics as 100% or anywhere near (I think, I don’t know how the logs work).

I’m not a spotify subscriber, so I don’t seem to be having this issue, but I’m wondering if you delete the Spotify app from your device, and only use the Sonos controller to access Spotify, does this issue still happen?

Same thing has been happening to me as well! I went ahead and submitted diagnostics to Sonos. Gives me jump scares when it decides to jump to 100 %.

Diagnostic id 794708529, although I've got the max volume set to around 50% but it still jumps up to that!

Aye, might start doing it every time it happens as well… it’s happening less, though. Because I listen to music less, especially in the evenings. Not sure whether that counts as a solution.

Really annoying. Please fix this.