Hello, I have a 2020 Pacifica, just purchased new a month ago- right now I have 800 miles on it. I noticed about 400 miles ago that whenever I was in park with engine on, the front seats had a slight vibration. (not felt in back). it is enough that if I had a glass of water in the front cup holder you would see the water vibrate. It also seems to now be happening when I am braking at stop lights. Anyone else experiencing this? It is slight enough that I have a feeling Chrysler will tell me its normal, but it doesn't feel normal. thank you!