After updating Xbox One S, and two Windows 10 laptops to the latest version of Minecraft Bedrock. Xbox One cannot see Worlds hosted by Windows 10 systems. They are on the same network. I've tried logging into different accounts on systems. Disabling firewall. I've created new worlds on the Windows 10 laptops, same effect.

When in the Play menu --> Friends Tab, Xbox One does see that there is a friend available but does not show any world as joinable.

Windows 10 systems can connect to worlds hosted by the Xbox One. 

Possibly related issues:
https://bugs.mojang.com/browse/MCPE-55078?jql=project%20%3D%20%22Minecraft%20(Bedrock%20codebase)%22%20AND%20resolution%20%3D%20Unresolved%20AND%20affectedVersion%20%3D%201.13.0%20%20AND%20(text%20~%20%27join%27%20OR%20text%20~%20%27lan%27%20OR%20text%20~%20%27LAN%27)%20ORDER%20BY%20updated%20DESC