2023 BMW X5 STRUCTURE,UNKNOWN OR OTHER

My sunroof spontaneously exploded yesterday, which sounded like a loud shotgun blast going off. Fortunately my vehicle was stopped at the time, but no rocks or debris had hit it to cause this then or previously, and nothing had fallen on it. No warning or other symptoms prior to this happening, the car was in mint condition and always garaged, 34,750 miles. Could have been much worse had I been driving at highway speeds and not stopped at a traffic light.