System: Windows 10 Pro, game from Steam.
Game version: 0.5.1.2759 Rel
Xbox networking shows multiplayer NAT type moderate, server connectivity as connected. But this seems to be going on and off randomly without any changes on my side.
I can't host any games, shows as "cannot connect to multiplayer". Set myself up as DMZ and same issue. Network has not changed at all since last time it worked (before the Koi update, but now the group finally had time to try it). Just in case though, I added the ports to port forward and even tried DMZ (as stated). Same issue. I can't host.