hello!! so i have a 2014 nissan versa sv 1.6 with CVT transmission. today i was getting ready to drive away from the curb when i put my car from park into drive, and the car started rolling even though my foot was still on the brake? should i be worried about this? the street i was on was on a slight hill, but nothing too steep, it was pretty flat. also, i’ve noticed if i’m in a parking lot and i put my car into drive, it will sometimes roll backwards. is it something with my CVT? Brakes? anything i should be worried about? thanks!