Press the UI button to highlight another button

[code-and-design-inc]

I am using Unity2018.4.0f1.

I use the Horizontal Layout Group to arrange the buttons.

The left button is highlighted no matter which button you press.

The button is clicked and the highlight color is the color of the button you are pressing.

I think a bug in Unity.

Am I not good at making it?

This image is pressing the right button.

However, the left is highlighted.

[code-and-design-inc]

this image