Didn't see anything like this previously posted. I'm still testing Sleep as Android on a trial basis. I first used it in conjunction with a Samsung smart watch (but the battery impact was kinda high).
So when Sonar was added in a recent upgrade I was psyched. I disabled the smart watch link. Lullaby has always been off. But about 15 mins after starting sleep with Sonar active, the phone (a rooted Samsung Note 3 running 4.4.4) music starts blaring! And I find that at least one other music app (usually ArmAmp or Rhapsody/Napster) has been started and is playing at full volume (because Sonar has maxed the volume).
The only conditions that cause this scenario is running Sleep As Android with Sonar on...
Am I missing a setting somewhere? Are there any other of similar reports?