If I`am in the car with engine running and press unlock on the driver`s door every door unlocks but the driver`s side rear door.
Outside with the driver`s door open and using the unlock button on driver`s door same thing, same thing using the FOB.
If I use the door handle to lock the doors, and then use the door handle (not FOB) to unlock the doors and open driver`s door “ALL” the doors unlock.
My FOB or door button will not unlock the driver`s side rear door, so I have 1 out of 3 ways to unlock that door.
Other day the rear gate did not work from inside or outside, think I pushed the gate button on dash just when the wife opened her door.
So locked the car with the door handle and unlocked with door handle, that fixed it for me and it`s still working.
Just another option to try.
You would think unlock would mean just that, but on my Ascent the door handle is King at this point.
