When my Model X is charged to 90%, I find that the rated range is 220 miles and a message stating that charging is complete. If I then don't drive the car for a couple days but leave the charger connected, I find the the rated range has dropped. Sometime I find the rated range is as low as 212 miles. I notice that I cannot start charging to 90% using the Tesla phone app under these conditions. Why does that happen? Is charging to 90% supposed to happen periodically when the car is connected to a high amperage Tesla wall connector?