Facebook unshortening leads to login page url

[SvenLieber]

I noticed that the unshortening does not work properly for Facebook links. I used unshrtn together with Twarc's unshrtn.py script.

When I visit for example this URL (https://bit.ly/36inqd5) in a Browser I get forwarded to a Facebook post (without having to login), but providing the link to unshrtn I receive the following (the Facebook login page):

{
  canonical: "https://www.facebook.com/login/web/",
  status: 200,
  content_type: "text/html; charset="utf-8"",
  title: "Aanmelden bij Facebook",
  description: "Meld je aan bij Facebook om te delen en contact te maken met je vrienden, familie en mensen die je kent.",
  image: null,
  publisher: "Facebook",
  keywords: null,
  short: "https://bit.ly/36inqd5",
  long: "https://www.facebook.com/login/? 
 next=https%3A%2F%2Fwww.facebook.com%2FRembrandt.Schilderijen%2Fposts%2F251379046374635",
}