Door Lock Issue

I’m having 2 problems with my driver door lock just seeing if anyone else has had this issue. I have a 2018 TRD Off Road. When I start my car and go to back out of my driveway, I when I put it in reverse from park the door lock will switch back and forth rapidly a few times. And today I just notice that my driver door isn’t locking. I tried to manually lock and I tried the fob no success with either. All the other doors are locking just fine. On one occasion the door seemed to lock it would pull out just a bit but then if you let go of handle and pull again the door would unlock and open all the way.
I have an appointment to take to the dealership but if anyone has any information to try it would be appreciated. I haven’t had time to fiddle around with anything as I noticed on my way into work. Thanks.

 

Sub'd to see if door lock actuators are a common problem. Over the winter my right rear actuator made goofy noises a few times, but never issues.