I think i found another glitch. If you on the dashboard and you have someone invite you and you join from the dashboard it will say you need too buy the game. Then you just press a and your back too normal but the other person needs too invite you again. So just to save time join a game while you in Minecraft itself
This is a problem with Xbox. If you notice when you first launch any game it says that you need to sign in/upgrade to gold. You will get this sometimes get this on Arcade games. This has been a problem for a while.