Skulls and Intel Achievements Not Unlocking

I picked up Skull 13 out of 13 today without getting the achievement. It still shows 92% Done when snapping the achievement app.
I also picked up my last intel right next to the skull for 117/117 intel. That did not unlock either (there is no tracker for that). Neither are showing that “Done! Unlocking” thing I got when playing other games.

However, both in game & this website shows that I have 100% all collectibles.
How do I fix this?

Same here. Finally got around to collecting the rest of the items and now the achievement is not popping. I am thinking it has something to do with the NXE update

Same problem. I collected all skulls and intel today aswell - no achievements.
There seems to be a general problem with unlocking achievements on Xbox One right now.
Guess we’ll have to wait and see. Really hope this gets resolved soon.

Hey again! Just wanted to say I got the achievements now!
I don’t know if that was the key, but I did the following things: I deleted my Xbox Live Gamertag from the console, restarted it and re-downloaded my gamertag again to login. Still no achievements, but then I went back into Halo 5 and collected 1 random skull and I immediately got the skull achievement and after 1 random intel I also got the intel achievement.
Maybe you can skip the whole “delete account and re-download it”-Part and you just have to trigger them again by collecting a skull/intel, since the general issue with not unlocking achievements seems to have been fixed on MS’ and/or Xbox Live’s part now. But anyway, try doing that if they still haven’t unlocked for you! Good luck!

I got the gravelord achievement by collecting a skull again.

Collected another skull after 13/13. Still can’t get it to pop.