I get this on a regular basis using my Nokia WH-208 headset. volume controls for all functions; music, video, phone, speaker... etc., will become ineffective, leaving the volume at the last selected level before the issue occurred. The only remedy I've found that works is a soft reset, with the headset removed. I now need to do this procedure about two-three times a week. Have not been able to determine what is causing it in the first pace though.