It's not.

page down should work now, maybe you need to hard refresh?

Define "should work". It's still scrolljacking. I don't get my native browser smooth scrolling down a page.

What browser are you using? Can you describe the issue? Typically scroll jacking is when you hook on scroll to forcefully scroll the page to something, but that's not happening here.

> What browser are you using?

Safari

> Typically scroll jacking is when you hook on scroll to forcefully scroll the page to something, but that's not happening here.

That's literally what's happening here. Open the web inspector, and set a breakpoint on the scroll event.