Fill won't update from class change

[Anders Blomberg]

So I have this file where all my surfaces are landscape areas, built up by materials. In plan view they're set to fill by class style. But when I update the hatch for the fill in the class my landscape area won't automatically update. I have to click in the fill box and select it to use class style, which it already was, and then the fill will update. The issue with this is that when using a class override in a viewport, I can't change the fill at all. Any ideas of what's wrong here?