rear doors and tailgate wont unlock

[freedo]

Having a odd door lock issue with my 05. I have it programmed to unlock all doors with one key press. But randomly it only unlocks just the front doors and the rear hatch. Rear doors and rear tailgate stay locked. Rear doors will not manually unlock from the inside either. Unlock with key in door no difference along with the unlock button behind the shifter. Its not every time but its pretty frequent and extremely annoying. I did not have the X5 for very long before I had the locks programmed this way so I cant be sure the programming caused this. It also happens when locking that sometimes the rear doors wont lock with the fronts and if you open them the alarm goes off. Any thoughts on where I should look? Also shouldnt the interior door handles unlock the doors no matter what? Seems unsafe that there no mechanical override in the event of a accident. everything else on the rear doors and trunk work. wiper, washer, windows, soft close, lights etc. just the unlock has completely failed on the rear doors and tailgate