Why isn't my internet radio pausing when call comes in over bluetooth in the car?

[iMore Question]

internet radio not pausing when call comes in over bluetooth in the car

before the latest update, when listening to internet radio on my iphone 5 over bluetooth in the car, when a call came in, the radio would automatically pause. Now when an call comes in , the internet radio continues to play so I'm unable to hear the caller speak. It no longer pauses when incoming calls