Facebook badge not showing

Hi! I have selected the Badge Only for several of my apps, and it's working on all of them, but facebook.

It has this error for a while, I've changed several phones, deleted the app and the data and reinstalled it, removed the notifications to none, to all, to only badges, to no badges but sounds. Tried everything I could think of, ask all of my friends who use iphone and still, the badge is still no showing. Though I don't want to be bothered everytime I have a notification, I do want to know if there's something new or not without having to actually access the app. Can you please help me?

Thanks!