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.
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.