Before last week, I could Play Minecraft on my Xbox One and join a multiplayer game with my wife (playing Minecraft for Windows 10).  Now, When I try, it says that Xbox Live Gold is required (I haven't had a Gold account for nearly a year).  I used to be able to accept friend invites, or just go to the friends tab and see her playing, and join her game.  Now she doesn't even show up on the friends tab as playing the game.  However, if I start a Minecraft game on MY computer, under my Microsoft for Windows 10 account, that game does show up in the friends tab on my Xbox One, and I can join that game just fine.

Looking at the Minecraft Better Together update, it says
"Do I need an Xbox Live Gold subscription to play Minecraft online?

For local multiplayer you will not need an Xbox Live Gold subscription."

I checked my wife's game settings, and her multiplayer is on, and it is set to be visible on LAN, and I can join that game from my PC using Minecraft for Windows 10, just not from my Xbox One using Minecraft.

So why can I join one multiplayer LAN game but not the other?  Especially when I used to be able to join my wife's games before last week just fine from my Xbox One.

Please Help

Joe