sliding silverado

this is happening to me several times now. 2021 silverado The truck is rolling in the park, AND the truck has rolled back on a light incline , going to the dealer tomorrow , I made a post with video of attached InShot_20230122_145341164.mp4

yep 100% in park! and today started rolling back while in drive, with the foot off the brake.

this happened once before last year and thought it sliding due to ice . well I got it on video the truck is in park and it's rolling down the driveway . and today driving I was on a slight hill in drive and with foot off the brake tje truck is rolling backwards InShot_20230122_145341164.mp4