I have a 2012 Santa Fe Sport with NAV system. Recently when using the Bluetooth feature to make a call, there is an uncomfortably loud static blast that occurs after the number is dialed and before ringing starts. I am using a Motorola Droid Razr Maxx. Dealership is unable to determine the cause of the static. The phone has been deleted from the car radio and vice versa. Anyone else experiencing this issue and found a solution?