My iPhone 7 is Bluetooth connected to my 2015 535dX. Using google maps on phone it shows on display as a phone call. Sometimes after Siri finishes there is a pop, less than 50% of the time. Yesterday it popped once when her last word was Bakersfield, didn***8217;t pop on her next direction ending with Bakersfield. Passenger thinks pop is coming from speaker in A pillar. Anyone know how to fix this?