With auto lock it beeps when I walk away. Sometime it boots several quick beeps?

Its telling your something is wrong - if you walk back to the car without your fob I suspect you will find it hasn't locked, Happens to us all the time on our 2018 Touring - one expensive messed up computer. I constantly curse the electroronics on this car and will likely check out other brands next time. I have to go back to the car and an open a door and shut it again and then it usually behaves see https://www.crvownersclub.com/threads/warning-beeps.175050/ - oh and in our case, sometimes I think it is is realated to both of us having our fobs and possibly the order of entry/exit that may be tripping the auto luck up.