Facebook Contacts disappearing from contacts

I am using the iOS Facebook Integration, which adds my Facebook friends to my contacts in the phone app. Yesterday I noticed that some of these Facebook contacts have been disappeared, despite being still 'Friends' with them on Facebook.

Is this maybe due to some Facebook privacy feature?


Solution 1:

It seems Facebook did this on purpose. Facebook tries to only sync contacts which include useful information.

Friends without contact information other than a '@facebook.com'-email are no longer synced.

[Source]