When I have charged my Clarity 2018 to the maximum and than go for a short trip say down 2 bars on the charge indicator when I turn the car off. When I start the car again after some time , especially overnight, the charge indicator seems to be several bars lower. Is this real and what is the explanation? When the car is fully charged in the evening it is always fully charged the next morning. This only seems to happen after using only a little of the charge and then letting the car sit. Is the amount of charge being reevaluated over time?