I am playing Coop on Doom/Doom 2 between a Dell Win 10 (host also) and a 2011 MacBook Pro running OSX Sierra. Both machines are on a wifi network of a AirPort Extreme AC model connected at 5GHz.
Frequently the Mac will fall out of Sync and the player "doesn't exist", no longer affecting damage to monsters nor able to pick up items or open doors. What is causing this and is there anything I can do to resolve it? Very annoying.
Running Doomsday version 2293 (2.1) on both machines.