MCT8316A: Let me know about deceleration control during speed loop control

Hi Team

I want to know about deceleration control during speed loop control.

The figure below shows the waveform of speed change.
Brown is the speed waveform and red is the speed command waveform.

Deceleration control, seems speed down in two step. This not change in any combination of Kp and Ki.

Is there a way to get rid of this, changing the parameter?