I want to join my friends world sometimes through Xbox live and sometimes through the local network but every time I try and join it just comes up with "unable to connect to world". This has happened multiple times over the last few days. They are able to join my worlds and I can still join servers such as lifeboat but I can't join their world. I'm not sure why this is happening, I've tried logging off and on Xbox live and completely shutting down my iPad but it doesn't fix the problem.