@bo3bdar I can confirm that a 2 button reset/reboot seems to have solved my overnight drain problem. I've tested this over a couple of weeks now and it's definitely gone. The car can sit (as it was able to before) for a few days without dropping or maybe 1% after several days but nothing like what it had become and what this post was about.
As a current example, I parked the car up last Tuesday evening and haven't taken the car out at all yet and it's still showing the same percentage today (Sunday), that's 5 days give or take.
As an aside, I have since updated to 2022.36.6 (was pushed by service in response to complains of emergency brake warnings) and while this hasn't affected the overnight drain, I believe it has changed the way in which the car is reporting battery percentage, resulting in slightly more usage than before while driving.
As a current example, I parked the car up last Tuesday evening and haven't taken the car out at all yet and it's still showing the same percentage today (Sunday), that's 5 days give or take.
As an aside, I have since updated to 2022.36.6 (was pushed by service in response to complains of emergency brake warnings) and while this hasn't affected the overnight drain, I believe it has changed the way in which the car is reporting battery percentage, resulting in slightly more usage than before while driving.