This has been a recurring problem in the industry for the last decade or so. Many of the high end class a's have it also. They are offering the correct solution which is to replace the panel, I would get it taken care of now while you have a warrantee. It will get worse and greatly devalue your rig if it is not taken care of. Closely check the other panels for any signs of cracking even if minor, I would get it done asap.
2010 Phoenix Cruiser 3100, 2016 Hyundai Veloster, Demco SS dolly