Completed Solo Legendary, No Achievement

I bought Halo 5 a couple days ago, and for the sake of completion, struggled my way through solo Legendary the first time through - the game even says this in the Campaign menu - yet neither did an Achievement bleep-bloop at the conclusion of the credits as I expected, nor does the Waypoint website acknowledge that ANY of my completed missions were solo Legendary (it DOES, however, say that they were indeed Legendary). Help me, 343, I don’t want to have to do it again!

If it helps: for some reason, my acquisition of the Mission 7 completion achievement was delayed until the credits were rolling. Dunno what that was all about.

Also, I was online for 100% of the completed missions, so I doubt anything was lost there, unless an outage of which I was unaware occurred.

I DID, however, need to step away in the middle of a few missions, during which my Xbox One “turned off”, but, when I returned, allowed me to resume where I had left off. That might have something to do with it

If you check on your campaign stats here, says that some missions were not completed, Swords of Sanghelios, Reunion, and Unconfirmed, try re-doing those 3 missions to see if the achievement pops up?

I was just now playing, and all the completion stuff popped up at once. If anyone from the team did that - thank you! If not - disregard this whole topic!

I have something similar but not exactly the same. I got the achievement for solo legendary but Waypoint summary stats show only Heroic completion.

> 2533274874206196;3:
> I was just now playing, and all the completion stuff popped up at once. If anyone from the team did that - thank you! If not - disregard this whole topic!

I got several achievements that were quite delayed and others were rewarded without a notification at all. They seem quite glitchy in this game.

So I’m having similar issues with the achievement. I went threw my service record and it shows completed on legendary on all missions but no achievement. I’m thinking it’s because I switched my Xbox. Any help with this would be awesome.