So I finally managed to fix my disconnection issues that arose after The Dark Below released on Xbox One. Before the DLC it was going steady with a few disconnects here and there, and I was then on a Strict NAT. A few days after the DLC it started disconnecting either right away or at least within every 30 minutes. I was now getting constant Bee and Anteater errors. Now I finally managed to get my NAT completely opened, with no help from Xbox Support who directed me to ISP, and my ISP (UPC) who apparently don't offer support at all. Another issue I was having was the patches downloading every time I turned on the Xbox. Once on an open NAT, Anteater was gone but I was still disconnecting from Bee. After a pretty annoying weekend of disconnects I decided to try reinstalling the whole thing, thinking perhaps something in the DLC files got corrupted during installation. VOILA! I am no longer getting disconnected, at all! I've been playing all night, now it's Sunday and still no disconnects. The patches aren't re-downloading either. I'm writing this in hopes of helping others with the same issue. If you've opened you NAT but still get disconnected, try reinstalling your game. If Bungie could sticky this, or perhaps update their Networking Guide with a note regarding the DLC possibly being corrupted for a lot of players, that would likely help many.