This is all caused by the way backgrounded apps that use voice are handled. I wish Apple made it more modern and did't make the status bar double in size and become an ugly green or red color. It should an icon next to the battery like the Location Services arrow is and pulling down Notification center should have a shortcut to the active app instead.
Similar behaviour on my 6 plus. Status bar &Icon grid shifted down with normal location of status bar showing top of my background wallpaper. A restart solved issues with no further instances.