Navigon not running in background?

One of the apps I was most excited about trying was Navigon. It was my understanding that with multi-tasking you could have Navigon running in the background as you checked other apps, including still giving voice directions.

However, I'm not seeing this. Even if I try to switch between apps, double clicking the home button, it's as though the app opens fresh every time, not even leaving off where I once was.

When I do navigate to another app, the gps icon (the arrow) at the top of the screen disappears.

I have the most recent version in the app store. Am I missing something?