WarZone Firefight Match Missing from Recent Games.

So a match I played today where we completed all 5 rounds in WarZone Firefight on Raid on Apex 7 (the beach one) doesn’t show up on my game history on Halo Waypoint (or at least not before I posted this). I guess the game was too busy trying to receive game data that I backed out of the post game carnage report and got into another Firefight match. I did however get the achievement for winning 5 WarZone Firefight games. I also recorded a game clip the end of the game where I get killed and it shows the team won and my score. I guess I’m lucky enough to have earned the achievement, but I still feel cheated that I got no XP or REQ points from that match (again from before I posted this).
I hope this didn’t happen to the other guys I played with, or anyone else for that matter.

I recently had this same problem: no game history. Likewise, the game was repeatedly unable to load game stats after each matchmaking game I played. Then I recalled that this had happened before. Previously, I fixed the problem by uninstalling The Halo Waypoint App for Xbox one. Sure enough, last week I installed the app again after recently purchasing MCC and watching the Nighfall series. The inability to load stats and save games in my cache did not occur immeadiately but it was within a week of doing so. Once again, uninstalling Halo Waypoint app and then restarting my Xbox one fixed this problem for me.