P-side door actuator

I just noticed an issue with my VX.

As usual, driver's door only unlocked by remote, I reached over from inside and unlocked the P-side front to get some shopping out of once parked. I noticed that the rear doors didn't unlock with it. Then forgot about it.

I locked car and forgot shopping. 10min later remembered and went to car forgetting I'd locked it, noticed P-side door still unlocked so figured didn't lock it anyway and tripped the alarm when I opened the door.

Further testing from inside car to replicate. D-door only unlocked, unlock either rear door manually will unlock the other doors with it. But unlock P-door manually only unlocks that door. But when car locked again by remote the P-side stays unlocked, and therefore triggers alarm if opened.

If I fully lock by remote or fully unlock it the P-side front door operates perfectly, and when done manually has no resistance at all as if sticking at all. It just seems like manually locking or unlocking isn't talking to the rest of the system. The actuator itself seems to function ok when not in this particular sequence. It just doesn't tell the rest of the car what position it is in.

Other than replacing the entire door latch and actuator, is there another possibly reason that may be causing this? thanks

 

Yes, operates perfectly by key fob. Manual operation of the lock is where it falls through.

 

Anyone else had a similar issue that they sorted out? Thanks