I had that failure mode too, but it was on the passenger doors. It's commonly called "machine gun locks." Dealer fixed it both times. Once under warranty at 23000 miles and once for free (good will) at 75000 miles.

Are you still under warranty? Even if not, I'd argue hard for the good will repair of this known design defect.

But my current problem is on the rear cargo door and it doesn't lock/unlock/lock/etc like the machine gun lock noise.