When I have a master component on an artboard that I resize with the Responsive Resize option turned on the component is resized but doesn't update the other instances of the component. So far so good. But it looks like the master component is now a different size (filled diamond symbol) but when I drag a new instance of this component from the sidebar it is still the size it was before resizing it. And if I edit the resized master component it messes up the other instances that are still the same size as before. So something is not working as supposed.

I personally think this master component should be turned into a modified instance (outlined diamond with a dot symbol) when the artboard is responsively resized, leaving the (real) master component as is and thus not affecting instances on other artboards which probably shouldn't be resized.