this has been happening to me a lot lately where Halo 5 does not save my stats for the post carnage report. That means all my experience, req points etc are not rewarded. This make me furious because I won a free for all match in the onyx rank WITH a legendary xp bonus. Instead of rewarding me, the carnage report just loads forever. This has also happened to me with legendary req bonuses for warzone. So far, I have missed out on thousands of experience and req points for matches I’ve done extremely well in. I feel cheated, and I really wish 343i would compensate me for this but I know they’re busy with bigger problems. This just disappoints me all too much.
Yeah I’ve had a few that didn’t show the report or rewards… 
But of course when I need to leave a free for all match, it definitely saves those stats no problem! Why such a penalty, its not like I’m neglecting any teammates. My onyx ranking should be much higher. Not going to play that playlist for a long time now.
Also, those legendary req and xp bonus boosts were purchased via gold packs. I paid some real money and part of that keeps getting thrown away. I definitely refuse to buy microtransactuons ever again until this problem is fixed and I get some sort of compensation.