every time I connect my iPhone to a Sonos speaker via AirPlay 2 and alter the volume in the Control Center the iPhone volume goes crazy loud. If I check the volume level in iOS preferences everything is fine. I have to move a bit the volume slider in the preferences to "reset" the iPhone volume to the shown level. Apparently there's no problem if I alter the volue in the notification center of lockscreen. Any suggestions to solve this issue?
I'm using an iPhone XS Max running iOS 14.2. I own two Sonos One (Gen2), Beam, play:5 (Gen 1) and a Boost. Everything is updated to the latest firmware version.
Thanks in advance for any kind answer.