Anyone else having this problem?

Occasionally when I hang up, either the phone (1st gen iPhone) or the car doesn't release the system and I'm stuck with no music. When it happens, the timer reads 00:01 the entire time of the call and after I've hung up. I've tried powering off my phone and it doesn't help so it must be the car. I have to stop and turn off the car before I can get the system reset. Anyone else have this problem and find a fix for it?

 

I've had a similiar problem with my aftermarket system, just try making a call again and hang up... that's how I solved mine