IOS GameCenter crash on release

Closed, because of duplication:

Hi.

After releasing a game on App Store we noticed some users reported crashing. It turns out it happens only when attemtping to log in to GameCenter. We are using some of the blueprints to gather data from GameCenter( uch as Read Friends) + some functionality to use the native GC window ( leaderboards, achievements). The tricky part is the crashes are not reproducible in sandbox - they only happen on live app and only to some users.

Did anyone encounter anything similar?