Hi! I have celebrated quite a few anniversaries of my 29th birthday and although I'm not as fast as my grown children with this stuff, I'm usually able to figure things out on my own but this has me stumped.
I have version 1.2.901.70 on my xbox one s (the Minecraft version that was given to me for Christmas this year!!) and so does my brother in a different state on his new xbox one X. I see chatter of a 1.13 version, but see no update for it to download. I can join his world although since Christmas there has been major lag issues AND I must be totally out of the game and accept his invitation to to get there. When he tries to join mine, he gets the 'Unable to connect to world' message. I have all of my multiplayers set to 'on' and friends of friends, and my NAT setting is open. Wnen I check the system multiplayer check, it says all is good.
My brother is an IMO/coder and this has him stumped, too.