Party issue/bug and matchmaking with friends

To fix this I would suggest continuing to switch your location see if you can find a way to make it permanent. Also this isn't just with Brazil it happens in other places to like the U.S. but I don't think as common. If it happens I would suggest quieting the game and restarting it in xbox home. Also make sure you are inviting your friends through the game itself not the xbox home because that doesn't work right quite frequently. To invite people through the game there should be a tiny box with your gamer picture in the left hand corner, click on that, then press a over who you want to invite e to the game.