Changes to Z-Offset Not Always Remembered (was "Sticky Z Offset setting for 3D printing")

Snapmaker 2.0
8

I am new to 3D printing and just got snapmaker 2. Does that mean I don’t have to calibrate everytime I turn on the printer? Anyone can’t get auto-calibration to work well? Am I the only one? I figured the proximity sensor doesn’t work on mine…