My volume buttons keep defaulting to changing the media volume without me selecting it as the option. If I restart the phone it'll go back to changing the ringtone volume for a while then go back to changing media again.
Yeah that's a given but with nothing connected and nothing running with no apps or media open it will change the media volume and not the ringtone volume.
this is a setting in your sound menu...when you turn any volume down..drop the whole menu down and at the bottom is a toggle to turn that feature off..I hope this helps