I'm curious - do you start the Navi app with the "software button" or the physical hardware button? Does it make any difference depending on how your start it? Just wondering if things work any differently depending on how you start it (like maybe if you use the physical Navi button to start it, then the physical Navi button will take you back to the radio functions as well). It's a *long* shot, but.... :-)

Or... Are there any settings in the radio interface settings menu that may make a difference?

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