When I 'm logged in to play, no problem.

Then, when I play offline, the game tries to connect me to the XBox Live Account. But he can't while I'm offline.

Then the world start to load normally, and then when he tries to save (Automaticly an Manually by quiting the world), the game freezes. I't happens to the iPhone (iOS 10) , iPhone 6 (iOS 12.0.1) and the iPad Air 2 (iOS 12.0.1).

When I restart the game, I need to log of manually. And with chance; nothing is happened to the world: Duplicated items/blocks and forgotten blocks.