Using range radar but the height still shaking up and down when stop

I met a problem about the height control.
when i make the quad x loiter in position mode,the height of the plane can not stop correct
itself,it may like the MPC_Z_P too big make the plane Over adjustment。
but the anaylise of the plot may see the local_potition_z have a delay about the distance.current_range
like this

should i change the value:

the log url: