header image is not shown.

Customizer > Theme Options > Header >

1. I uploded an image at “Inner pages header background”

2. and I changed background-color to #ffffff at “Inner pages header background color”

Then header image that I uploaded is disappeared.
I guess the background-color is on the front burner.

I want to show the image on the header but I can’t delete background-color setting.
*Actually it’s possible to make it to be default(#e8554e) but the image is still not shown.