I have a Sonos 5.1 setup consisting of a beam, sonos one x2, and sub. Recently when listening to Spotify on my iPhone XS (the only controller I have active in my household), the volume on the system raises to max volume when going to change the volume in the sonos app, or from the lock screen. I have only had the system for a few weeks and it seems to only do this when Spotify is active, not Pandora or while using the TV. Currently my system is on version 10.1.2, and my iPhone controller states the version is also 10.1.2. My system is currently connected via wireless, and not through Sonosnet.
I have seen in other forums that the work around is to disable hardware volume control and lock screen controls in the Sonos settings in the native iPhone settings app. But my question is, has this issue been permanently addressed yet in a sonos update/will it be in the future? Or does this have to do with possibly having a faulty system?