I did get a "strange behavior" myself, but no network in the car yet. I put the car in "run" (without starting) and let the player start. It came up, I started gpsapp and it got a fix. I started the car, and gpsapp was gone from the hijack menu. I pulled out and reinserted the player and it was all good. I should really get network in the car so I can debug...

As an aside, the icon seems to be about 75 degrees counterclockwise of where i'd expect it to point, but maybe I misunderstand what it is.