I do not know whether this phenomenon is a bug or a specification, but I found a solution so I will introduce it.

If it is already a TIPS, please delete it and report it along with the title.

 

phenomenon

After preparing the gradient layer ...

Set a color correction layer to change the color.

 

When these two layers are combined, the color changes like this. The same phenomenon occurs widely from "brightness contrast" to "gradient map".

 

Solution

Prepare a new layer at the bottom and paint it white.

 

After that, select "Color Correction Layer", "Gradation Layer", and "Pure White Layer", and combine the selected layers to create a beautiful combination.

For the sake of simplicity, the bottom layer was joined with only the left half painted white. The difference is obvious.

 

For gradation

For gradation map

that's all.