Can’t equip new helms from s8

I cannot equip the new helms I’ve unlocked. Is this a known bug or something? I currently have the flaming hyabyusa helm on and trying to equip the blackguard ashen crown. But for some reason it still says it’s locked despite me unlocking it for 1 point in the tier 18 area

Make sure you double check what game you have unlocked the helmet for. The new helmets are available for both Halo 3 and Halo: Reach.