I have my friend at my house and we both have Titanfall on Xbox One. When we are connected to the same network and attempt to join a lobby together, the person trying to join almost always gets a 'lost connection to server' message. Even if we get a third party (i.e. another friend) to host, the two of us (on the same network) cannot be in the third friend's lobby simultaneously! Seems to be working this morning, but last night we couldn't play more than a game or two together because of the issue I'm describing - anyone else LANing experienced this?
