Monster Hunter Freedom Unite (MHFU)

[Draxial]

When i try to launch the game with friends or randoms (Hamachi or not) we can join in guild hall, but when we start a mission we have a message ' <Name of member of the mission> broke connection ' something like this and we are logged in different "maps" (i'm alone on my map, my friend is alone on his map...) but when we go back to guild hall it's the same hall for us and we can see each other character.

Any solution for this ?
(Sorry for my bad english guys x: )