Why wont my facebook contacts sync?

[AC Question]

Hi

I've got a S6 Edge, UK on EE.

Its just had an update and now my facebook contacts wont sync to my phone.

I've got facebook installed, I've authorised Samsung to access my contacts and I've also changed the toggle switch in the account settings to sync the contacts.

When doing a manual sync it only takes a second, rather then what previously took a few mins.

Any ideas whats happened?

Thanks