Cannot load world

This is yet another update where I cannot connect via online multi-player.  There is a solid internet connection on both ends.  Sometimes it won't even show my family online when they are playing right in front of me and yes multi-player is turned on.  Both versions are identical and the Xbox one is on the minecraft preview and I am also on beta.  Please fix this.  There is a world we have worked on as a family in survival and the fact I can't join without making the screens tiny is really annoying.