My stats in Halo MCC haven’t been tracking for a few months. I’ve heard this is aknown issue but I have yet to see it addressed. I have been trying to grind for the multiplayer champion achievement but since my stats won’t track it has been stuck on 401 wins for months. I’m growing sick of waiting for a fix for this.
Same issue here. Have put in a support ticket but I suggest you to do the same!