This just recently started happening to me:
All doors are unlocked.
Shut off ignition, remove key, open drivers door, get out, close door.
Try to open drivers door....locked.
Pull handle second time, door opens.
Close door.
Try to open again, same problem. Door is locked.
Pull handle a second time, door opens!
Rear door remains unlocked.
????????????
All doors are unlocked.
Shut off ignition, remove key, open drivers door, get out, close door.
Try to open drivers door....locked.
Pull handle second time, door opens.
Close door.
Try to open again, same problem. Door is locked.
Pull handle a second time, door opens!
Rear door remains unlocked.
????????????