My "17 reverts back to last used when I start the vehicle. Do not turn off the climate control before turning off the vehicle. ....
While this is an answer, old conventional wisdom taught us to shut off a/c before starting the car to help eliminate stretching the belts, causing the dreaded squeal when starting the car or the AC compressor kicking on.
While most newer Vehicles probably have technology that limits the AC compressor from kicking on when you first start the car, thereby saving the belt, old habits die hard and it becomes a matter of habit to turn off the climate control each time you turn off the car.
Instead of turning the system completely off, when you're ready to shut down the car, just push the AC button in the climate control system before you turn off the car. This turns off the compressor, and leaves all of your fan and air flow choices in place when you start the car later.
At least that's what I do. I live in the desert Southwest - near Palm Springs - where we have many many warm days per year, so the AC system is in use probably 5 months out of the year... No belt squeal yet.
One other thought, when it came to the belts stretching issue on older vehicles, it was mostly front wheel drive with sideways mounted engines that had this problem. I don't remember most conventional mounted engines for rear wheel drive having that issue.