You don't resume to walking speed if you tap the front-left/right arrow on D-pad while sprinting

I don't resume to walking speed when tapped the front-left/right arrow on D-pad while sprinting.

What I expected to happen was...:
I would slow down, just like in win10.

What actually happened was...:
It does not slow down to walking speed.

Steps to Reproduce:
1. Sprint forward and move your finger to the front-left/right arrow
2. It doesn't slows down, that's so unfair for PvP!