Hey folks,
I answered this in the main announcement thread, but I’ll copy my response over here and also link the main thread below. I encourage you to read it as I’ve answered a lot of Roam questions over there. 
“That’s correct, both Move and Roam do this. The Roam is designed to wake up whenever the Sonos app is foregrounded. It’s by design to ensure there is little to no delay between opening the app and being able to target playback to that speaker. When the Roam or Move powers on this way and is not targeted for playback, it will be in a low power state, so battery drain will be kept to a minimum. Rest assured, you shouldn’t see any negative effects from the Roam waking like this.”
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