Minecraft Better Together crashes when adding player 2 on split screen

When I open a world in the Better Together edition, it loads perfectly for my account. When my wife goes to add herself to the game in split screen mode, it brings her to the "Building Terrain" loading screen, but then the screen goes black and takes us to the Xbox home page. We tried deleting the game then re downloading it, power cycling the console but those didn't work. Any suggestions?