When you have the car...the App defaults to a different screen.You've missed the point entirely!!!!
The app (which I used for months) shows instructional videos, shows your order, etc ALL WITHOUT ANY LINK TO THE ACTUAL CAR if you don't have the car yet.
The app suddenly not working with no notification like "update in progress" or???? is not ok. Neither the sales people nor any notice from Tesla lets one know that this (apparently) is a normal thing shortly before delivery of a car!