When a bone golem uses its fear howl, if you are immune to fear and not immune to mind-affecting / paralysis, the fear howl will paralyze you without either roll to save against it, instead of rolling the two saves as per the books.
This is the intended roll we're meant to see, using freedom in case I failed the roll.
This is the effect when you only have fear immunity, and not immunity to mind-affecting spells or paralysis (So paladins without clarity/freedom likely see this a lot.)