Great.. now I'm going to notice this rattle.
So far I haven't noticed it in my 2019.. but then again I wasn't paying attention to it. I'm crossing my fingers they fixed it. Reading about your issue it does sound like the contraction of materials when cold is your issue. Don't know if it's possible to add padding to the trouble areas, under the molding. Possibly just a little bit of thin double sided foam tape is needed under the trim/rubber. (note I haven't looked to see if this is possible and just "thinking out loud")