PROBLEM: There have been so many cases where people can't join friends, primarily on Xbox. I too have experienced this. I can't play with my fiancé and its the sole reason we bought the game. We LOVE this game and want to play together!
QUESTION: Are you guys working on a fix?
Yes, we are absolutely going to fix this for everyone as soon as humanly possible!
We are working to make this better for everyone. I'm not joking when I say, I was poking everyone who would listen about making sure everyone could play with their friends. Everyone here at Epic really does care about this sort of thing. Apathy is not in our DNA. Stick with us!