List View Header colour - still doesn't apply in v5.3 really?

I simply change a List View Header colour from black to blue, save the changes. But when the View/Form loads, header font remains black

This used to be a problem in K2 v4.7, hasn't this been fixed by now in v5.3 ?

I can see the colour change while editing the List View, but then it doens't apply it when running the form.

Come on K2, a simple thing like this shouldn't be happening in your product in 2020...