I just had the same thing happen, My car has no accident history. It was about 100 degrees, opened driver side gull door and it cracked the glass above. I had the recall to re-gl;ue the appliqué in the center spine. My assessment is in the heat the appliqué and glass raised up and caught the door when it went up, cracking the glass. Tesla estimate repair 2400$. I have an extended Tesla warranty but they have initially refused to cover it (Centinela Ave Tesla in Los Angeles) but I am waiting for the SA to discuss with the manager. I had the recall in December 2020, 9 months ago where they reapplied the appliqué. My analysis is that the heat warped (either temporarily or permanently) the side of the glass and it catches the frame of the gull door glass. Maybe we have to look at our roofs before opening the door but I've had zero issues in the past. I think it's the heat that weakens the attachment. Anyway, I paid over 5K for an extended warranty, hope they can use it for this easy but expensive repair.