Last night, both of my phones kept changing the volume by themselves. Yes they both had good charge. The first sign was the Media volume for listening to the radio in bed. Looking at the settings for Sound, I could pull the slider louder but it would bounce back to near zero. Inside my radio app the same thing happened but took longer to bounce to zero, like 2 minutes instead of 2 secs.This was also true of the Ringer volume. So I shut down that phone and went to my second phone. Same exact symptoms! Shut down for night too. The fact that this never happened before argues against it being some setting for silence between say 12am and 6am. This morning after startup the volumes are holding steady on both phones. For now. Is this unHeard of? Is there a system tweak? Losing the radio is bad but tolerable, losing the ringer is intolerable. Except when desired.