Unable to see friend on multiplayer list

[momphilis]

My son/friend was hosting a game, we had already played like 10 hours on that save. When I load into the multiplayer list of join online game, it does not show him/the world on the "games hosted by friends- available games" list. I can see other friends, whom I have not played with, but not him in the save we played and he made me a cohost of. 
I was able to find a somewhat "go around" but choosing "host online game" and then "continue" to chose that saved world since I had a save. But then started getting an error saying that the world my not exist anymore or may have been deleted...it was not. I sort of got around that by going to the manage files option in the xbox app and using the verify/repair option which allowed me to join as the host when he isn't on. But I still don't know if we will be able to play together. As of last night we were in the same world briefly but we had both joined as host and could not see each others characters. 
I created a support ticket but have not heard anything as of yet.