Not getting achievments

I finally beat halo5 solo on legendary – and of course, both achievements for this (Lone Wolf and Forging a Legend) didn’t unlock. Xbox-live says they are 100% complete, but not unlocked. The in-game tracker shows all levels have been beat solo on legendary. Talked to xbox-live tech support, and they directed me here. How can this be resolved?

Thanks

Screenshots:
https://ibb.co/jxMHO8
https://ibb.co/fUsVbT

Hard reset and wait, sometimes takes a while to appear in your xbox one.