OK, let's iron out some of your parameters.

If your stepper drivers are set to some amount of micro steps, you should set parameter $1 to 255, meaning that the motor(s) will never be disabled, except in E-Stop.
That parameter mean that the stepper driver will be disabled after certain amount of time (in microseconds) after the last Step pulse was generated. When drivers are set to any micro stepping when disabled, motor will jump to the nearest full step, consequences: loosing position.

From the rest of the parameters, I can see that you do not have limit switches on your machine, so you are homing "in place".

From the photo of your machine it is obvious that you have a Chinese one, and our Chinese sellers are well known that the parameters for your machine could be all over the place.