Got Halo 5 today, Helioskrill armor not there

Games Halo 5: Guardians
1

I unlocked Cairo Station achievement earlier today, then went on to get “Legend”. I got the armor for the former achievement when I put in Halo 5 today, but I didn’t get Helioskrill.

I really hope it shows up soon, because I worked my -Yoink- off to get that achievement.

2

Here’s a photo proving it.

I have the Legend achievement. I also have 5 unlocked Armor sets in Halo 5, none of which are Helioskrill. What gives?

3

Yo, 343, a little help?