I have had a Xbox One since release. Just got the new Xbox One S. Have both set up in the living room, each with their own tv. One for me and one for my girlfriend. I have AT&T Gigapower Internet and I pay for Static IP’s. Each Xbox has it’s own public IP with the firewall disabled. Both Xbox’s have OPEN NAT. However, when we try to join eachother’s fireteam, it joins long enough to search for a game. Then one of us gets disconnected and thrown back to lobby while the other gets pushed into a game. We have tried playing together on other games and Halo 5 seems to be the only one having issues. Anybody have any idea?