Proximity Delay Help?

[mikex]

I'm getting too many phone calls cut off by my face hitting the phone. I tried setting the delay to 100 and 450 but don't see too much difference. Which is supposed to make the screen black longer? Also noticed a bug. It always sets the delay 50 more than what I select. Ex I select 100 and it sets to 150 I set it to 300 and it sets it to 350.

 

[Nickchapa]

the higher you set it the longer it will be but theres not much difference as im pretty sure its in milliseconds.