I recently got myself an AirPort Express to stream audio through my speakers. However it seems anytime i disconnect from the AirPort either by going out of range or switching off the AirPort, the source on the iPhone ALWAYS reverts back to the internal speakers. Meaning every single time I want to use the AirPort I must manually select the source.. it's annoying. Is this normal? In my car, when my phone connects to my head unit with bluetooth the music automatically switched to my car speakers. But this is bluetooth and the Airport connects with Wifi.