Okay, it looks like Unloved is name of your game? In that case, Saved\Logs folder should be in there. Can you get some logs from both someone playing as Listen Server and someone playing as Client, and attach them here?
I apologize we don’t have a good system for testing packaged games in Steam set up yet, but I’m working to set that up with networking devs here now. Until then, I kinda need to feel around what this looks like through you guys.