Capcom posted all its notes for the latest patch (1.03 on PlayStation 4, 126.96.36.199 on Xbox One) earlier today. Monster Hunter: World's woes on the Xbox One have indeed been addressed, "including 'Matchmake', 'Filter Search', 'Squad Sessions Session' and 'Respond to SOS'."
Other fixes for both the Xbox One and PlayStation 4 versions of the game include a patch for a bug that was keeping a few players from gathering research points correctly. Also, the update fixes an issue with the Hunting Horn that was preventing experts from performing their fancy-dancy moves correctly (and what's the point of using a Hunting Horn otherwise?).
Monster Hunter: World is available for PlayStation 4 and Xbox One. It's coming to PC this fall.