I've noticed a long-term problem that has spanned across two phones and probably dozens of car radios. After I use Pandora to stream audio through Bluetooth to any Ford Sync stereo system the app control notification will not allow itself to clear until I reboot my phone once or twice. Any Ford system from about 2010 up causes it to happen on my old Samsung galaxy phone and on my new Unihertz. No other car manufacturers seem to cause it to happen. Has anybody else noticed this? Is there a known fix?