Achievement not unlocking

Games Halo: The Master Chief Collection
1

I was playing the Halo 4 campaign on legendary with someone the first 4 mission gave me the achievements but after that i didn’t get any when the person i was playing with was still getting them when i looked at what levels i have done it shows i have done them on legendary but i don’t have the achievements any ideas they don’t even say unlocking

Achievements i am missing
Complete Reclaimer on legendary
Complete shutdown on Legendary
Beat par score on shutdown
Complete composer on Legendary
Beat par score on composer

2

I had a similar issue. Played as 2nd played and progress bar would go up for the LASO playlist but didn’t pop when requirements were met, and two other achievements too. Now none of them will progress. Most achievements worked, so odd that random ones don’t.Split screen is risky.

3

That happened to my friend.He was doing halo 3 odst in legendary and two achievements didn’t unlock.
Achievements that didn’t unlock.
Data Hive
and
Tayari Plaza.
Also the game said he didn’t do the missions.