Component instance not scaling as expected

Hi

I have created a somewhat basic slider as a component. It contains different variants.

 

When I try to make an instance of the component wider, it doesn’t behave as expected:
 

But if I detach the component the scaling works?

 

What makes it even more strange is that if I then make the detached instance into a component again it still behaves as expected? But then it is its own main component.

 

What might I be missing here?

Thanks