About 6 months ago, I began getting the "Audio Control Not Supported" message when trying to play music via my BT connection with my Samsung S6 phone. Up until then, I had no trouble with audio via BT. I've tried a bunch of things to get audio back (e.g. deleting the phone and re-syncing, checking settings, etc) but nothing has worked. I am assuming that an Android update must have messed this up. I have done no updates to the nav unit for about 2 years when I updated maps and BT audio was fine then so it can't be that. Any ideas?