Picked up JLR Friday, April 2. Ordered Dec 16, 2020. JB Status Jan 12, 2021. Invoiced Feb 24, 2021. Delivered to dealer April 1, 2021. Be careful plugging/unplugging wiring harness when swapping doors. First attempt gave rise to power mirrors not working as well as blind spot detection disabled. As others have noted, the problem is due to easily bent pins on the body-side connector. Straightening the pins fixes the problem.