Nokia Betalabs

Hi, this is something that annoys me for a while now. when im using navigation in the drive app and someone calls me or i press the menu button or anything else that puts the app in the background, upon returning to the app it says continue navigation yes/no (something like that, its not in english) and you have to press yes to continue.
why is that necessary, it just makes another step where you have to move your eyes from the road?
please give an option to diable that question or remove it