Conversion World bugs

After my last request closed because no one understand french, I write this with my bad english ! :

Since I have the game (beta) The game crash during the world conversion is not patched with the last updates 1.2.5 (nov 22)
The conversion of my XBO map crash at 81% and the map is an 130 Mo size. With all the updates out, when did you really patch this bug ?
The game is too slow during loading and downloading times and when we go on Spotify, YouTube or Microsoft Edge for somes reasons, the game close.

Please do somethings ! I want to play on my worldone day... HELP !!