Skill cooldown don't work correctly

[Mephitr 3]

Hello!

Last time I tested a lot of build on my paladin, but i saw weird think with skills cooldown. Idk why, but after crossing 10% of skills cooldown, every next value add general less skills cooldown in skills window. 
For example Purifying (1st pala skill) have 9 sec of cooldown, with 47,8% skills cooldown, the ability has 6 sec of cooldown. Correctly value should has 4,7s cooldown. 

This same skill with 88,3% skill cooldown, the ability only has 4,7 sec of cooldown.
4,7 sec its a value for ~48%. Correctly with value 88,3% cooldown, skill cooldown should has 1,05 sec.

 

Quote

Therefore, I have a few question:
1. Is each value of skills cooldown is calculated separately or as a whole?
2.This is bug or whether this is the intended action?
3. Is each any other statistic in game works compare like featured skills cooldown?

Edited December 28, 2020 by Mephitr

[Jcbref 610]

cooldown works like so: 

Cooldown

 

The "Cooldown" parameter increases the speed with which a character's skills recharge.

That is, if a hero has 100% of Cooldown, this means that his skills will recharge 2 times faster, that is, they will recharge in half the normal time.

You can calculate "Cooldown" time with the following formula:

original_time ÷ (1 + percent_ofload)

Using your example, it would look like this:

18 ÷ (1 + 48.2%) = 12.1 seconds

Put another way:

X = A / (1 + B)

 

Where:

X is the final recharge time;
A is the skill's original cooldown;
B is the skill reload percentage.

[Mephitr 3]

@Jcbreffthanks a lot for clearly explain