2018 BMW M550I Unknown Or Other Problems

Sunroof on 2018 BMW M550i "exploded" while driving home from work. Weather was cloudy, light rain in the 50's, late March in northern California, USA. Sunroof was in closed position and cars HVAC was not being used to create temperature or pressure difference. Heated seat was being used. Had been parked outdoors under an awning during the day and had been on the road for less than 15 minutes. The automobile will be taken to the nearest dealership in the morning. Pictures were taken. Significant safety risk to occupants if glass shatters when the "slider" is in the open position.

I WAS DRIVING ON THE HIGHWAY AND THE SUNROOF EXPLODED OUT OF NO WHERE, BMW SAID A ROCK HIT IT OR SOMETHING BUT I AM 90% SURE A ROCK DIDN'T HIT IT. DID NOT SEE ANYTHING FLY UP TOWARDS THE CAR. IT SOUNDED LIKE A GUNSHOT WENT OFF IN THE CAR AND GLASS SHOWERING ALL OVER YOU BECAUSE I HAD THE SHADE OPEN. LUCKILY IT DID NOT GET INTO MY EYES TO CAUSE ANOTHER ACCIDENT. GLASS SHATTERED UPWARDS AND FROM DOING RESEARCH IT LOOKS LIKE IT'S A COMMON PROBLEM