When clicking on a facebook post, sometimes I receive fb deeplink and sometimes the universal link of my app

Question

Since recently, Universal links were working well with our app but recently for some users while clicking on a facebook post we receive via func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) this deeplink -> fbxxxxxxxxx(FacebookAppId present in the app project)://authorize#target_url=universaLinkOfMyApp.

However, others users seems to still receive the universal link directly via func scene(_ scene: UIScene, continue userActivity: NSUserActivity) like before. (That's how we handle it until now)

Is there something else to configure to avoid this two behavior or I need to handle them both?

Thanks in advance for helping!