Carrier/rack problems of the 2014 Ford Taurus

Was driving my 2014 Ford Taurus, slowed down to merge from one interstate to another when all of a sudden, there is loud boom over my head like a bolder has hit the top of my car. Didn't see anyone around on foot. Nothing bounced off my car. No one around me pulled off to side like they were hit in case something did bounce off. After a few seconds, I hear this crackling all around my roof. I pull the inside cover back and see my glass is completely shattered and pieces are missing out. Glass is pointing up, like what happened came from inside the car not outside. I thought at first maybe a rock had hit it but there was no evidence of that. Don't know what to make of this. . . My local dealership is saying of course they've never heard of this problem. . . . I do have a picture.

Ford needs to investigate the durability of the front windshield on the 2014 model Taurus. I own two 2014 Taurus and within the first 6months of ownership, I have had to replace the windshields on both vehicles. Both vehs were hit in the same spot opposite sides with a rock and a cracked formed from one side to other within 4hrs of the incident. Each time we were traveling no more that 40/45 mph due to moderate traffic. Both windshields costing me $600 out of pocket. I have owned other model Ford vehicles(07 Ford 500 and 1998 explorer) that have withstood plenty of rocks at the windshield and not one chip or crack.