Any clue why my helix 9 g2n mega di(ducer mounted to trolling motor) take a hour to finally give a depth readout? I can put bottom range on 15 ft and see a good definition of bottom and guess the depth but would love to set on auto. Also the 2D won’t display anything either. After about a hour, I finally have a depth readout and go to auto then. 2D works by then as well. Really got bad after I did a update 3 weeks ago. If I move to next spot it takes another hour. I tried to stop sonar and it worked, for about 15 min then lost again. This thing is getting on my nerves. Thanks for any help.