I just got two new One SLs and a Play 5. They're all in the same physical room but are assigned as different rooms (the SLs are not in a stereo pair). I use them as a group through the Sonos app on iOS (all up to date) and generally they work and sound great with my primary music service, Spotify Connect. The one issue I run into consistently is that I will set the respective volumes on the three different devices (all exactly the same on the volume slider) in the Sonos app, and each time I go into the Spotify app and so much as touch the volume slider it scrambles that setting, makes the two One SLs slightly different volume and turns the Play 5 almost all the way down. Nothing I do seems to fix this and Ive looked around a lot for solutions. Thoughts?