I am using the Roon iOS app to control my Sonos speakers. If I mistakenly use the volume up or down buttons the volume coming from my speakers automatically adjusts to the same setting as on my iPhone.
This can lead to extremely loud volume that is a health risk and a risk for my equipment. This has been a problem for a long time- please fix ASAP.
This has happened on a few occasions via my iPad too over the past 12 months on various software versions.

