I have a Moto 360 and a GS5. Randomly through the day, my phone will turn it's volume all the way down and mute/silence itself, causing my watch to stop vibrating and alerting me of new messages/notifications. I am going crazy and have had no luck finding anything about this on the internet.

Just to be clear, I will turn my volume all the way up on my phone and usually multiple times a day I will notice that the phone's volume will go to silent. I will press the up volume button and it will show silent, vibrate, and then jump to full volume or wherever I left the volume.