2017 Outback battery keeps dying after a back door issue

I had an incident that the back door would not shut properly, and the car
gave a beep during initial driving, then the car would not start at all, and the
back door wouldn't open. The back door was pulled manually open from
inside, then the car battery was removed to force a total reset of the car. The
back door can open and close after that, but often with some noises at the
door. The car runs alright.
Since that incident, the car battery kept running low after a couple of days.
the battery was new and tested repeatedly fine. Each time a jump start will
trigger a back door noise. At the dealer shop for checking the electrical
system, I told the technician this situation, they could not find anything
wrong. My new battery just went died. Thanks for any advice to help identify
the power leaking.