Carrish

This may be the garbage cleaning of mobile phones and the deletion of the game directory.
Please check file directory /storage/emulated/0/Android/data/com.mojiang.minecraftpe/files exist.

Are you talking about cross-platform online? It appears that cross-platform connections are supported. 

I don't know what it is, my game is normal. 

Can't add friend's game in beta.

This is called characteristic.

Maybe your network connection is abnormal.