Force component instance to update font style?

I’ve built a component, added a bunch of instances of said component to my layout, and now decided to change one of the font styles in the component.

So I go back to the main component, make the change and…nothing. I can’t get all the instances of the component to reflect the change.

I also tried changing font size. Same thing. No changes to the instances of the component.

Tried color. That works! I can change the color! But not anything else. Is there a way to force these font size/style to change throughout the instances?