Have any of y’all ever had this problem? I can be sitting still look at structure and the screen will just start getting darker and the returns kind of blotchy. Then it will return to reading fine.. voltage is 10.9 on graph but has always been 10.5-11.5. The black box is on its own Milwakee battery. and I’m not sure what to check. It has just started doing this my last few trips.