Friend joins game and gets booted immediately

[DirtKobain47]

Me and a friend have a shared world and have been playing fine for about a week with no issues not even lag. Now when he joins he loads does not get to pick a character sees the kid case for a second and then gets booted due to a network error and vise versa, we have tried restarting internets, xboxs, deleting data and resyncing game, and making a new world and the issue still persists