My 2016 cargo van XL just had the windshield removed and resealed. The dealership’s “glass guy”, I think Safelight, said there were as many gaps as there were sealed areas along the top and that he has done others with the same problem. Mine has les than 30k miles. I had previously changed the roof mounted antenna base with no success. The dome light area would fill up with water then spill out onto the dash when I drove and hit the brakes. Maybe yours leaks in the same area but finds a different path to the floor? Mine wouldn’t leak while driving in the rain because of airflow over the windshield/roof, only when parked. Pop the dome light out before the next rain, stuff a rag in there and see if it’s wet afterwards. Good luck.