Right mouse button on part -> Replace reference set -> MODEL
-> Hid those parts.
What does "replace reference set" do ?
What for is it ?
Is it the right way to fix it ?
Reference Sets control the visibility and loading of components, ENTIRE PART contains everything, construction sketches etc.
MODEL should only contain solids.
Check your Customer Defaults to see what you are calling the solid reference set, I think default is MODEL.