Sonos controller app on iPhone running on IOS 11.2 beta

I suggest you post this on the beta community rather than here !
https://betacommunity.sonos.com

Maybe not... because it's an iOS beta and not a Sonos beta, the Sonos beta community wouldn't have anything to do with it. I would say that this is a valid place to post about issues with the latest release version of Sonos running on a beta version of iOS.

I was myself wondering if I should post it on the Sonos beta forum but, as you write, this applies to the latest official release of the Sonos app, as well as the latest beta version. I eventually did it on both forums

Just curious, have you tried deleting the app, rebooting the phone, then downloading a fresh version of the app? Actually, I might even try toggling the feature off and on, too, just to see.

Oops - sorry, my mistake!

Did both things, still no response from the volume buttons

Well, that was the only thing I could think of as a potential issue, i.e. a corrupt binary. I think I would submit a diagnostic at this point. Since I think the beta has been out for only a day or so, I suspect there hasn’t yet been a ton of effort by Sonos on it yet, although I could be wrong. But I’d bet they would appreciate more data on the issue.

Same for me. The iPhone volume buttons no long work using IOS 11.2 Beta.

Again, I suspect if you want to help, you could submit a diagnostic.

I have submitted a diagnostic. I was just concurring with the issue in the forum.

#8069682