That symbol for me stays on for varying lengths. I'm not sure your hypothesis is accurate. Case in point, there's been many times where I start my car in the garage and the light goes off instantaneously and times where it stays on for an extended period of times. Similarly, I've started the car with literally nothing around and have experienced the same varying length light. So.....I have no idea what the length of the light actually means.
I knew there would be a bug or two to fix. If you are not willing to deal with that... you don't purchase a first year model. And on top of that it was one of the first built. This car is amazing and I have zero regrets.
I will take it to the dealer in a few months or more. Going to wait for the health crises to pass over.