just recently had this fixed on my 2016. it leaked from day one a small amount, finally got bad enough to take to dealer...

turns my particular issue was that the header panel seal was either installed or manufactured incorrectly form the factory. it stuck down to far on the ends near the doors. upon seeing the new one it was obvious why the original leaked. i already posted the part number that was replaced and some photos over here: https://offroadpassport.com/forum/showthread.php?t=4897