I think I'm experiencing this exact issue on my 2019 Jeep Compass MP Limited. I tried what you suggest with my daughter's assistance and got some interesting results. Start Jeep > Wait for alll systems boot > Shift into R > "Check your Surroundings" on black screen > foot on brake, liftgate open > camera turns ON, video of the trees and sky clear as day > still in R, shut liftgate > blank screen returns. No sequence I tried seemed to knock it back into the correct order. The camera always thinks the door is open when it's shut, but the radio believes we're all good. This sounds wiring related but I've completely dismantled the liftgate door and wiring harness, Deoxit and dielectric grease. The failure is too inconsistent to be wiring related. If anyone can provide any possible suggestions I'm all ears... well eyes. I'm aware of TSB 08-076-22. Feels like it should be a recall... not sure why it isn't. If I somehow missed the train for the OTA update which is supposed to have fixed this, I need to confirm that. I can't tell how to see what version or firmware my uconnect is currently running.