They finally fixed mine and the issue was a camera module and the front camera. When it would work the front facing camera never did work. Not sure if water was getting into camera through the grille and shorting module.
We bought our 2020 premier on the first of the year. Been having the issue on and off for the entire time of ownership. Very intermittent for us so hasn’t been worth taking to the dealership just for them to say, “looks fine to me!” But after seeing this forum with others having the same issue I might decide to take it in. Maybe they will issue some sort of fix for it. Hopefully because my wife really loves her Traverse. Located in California.