SKULL ARCHIVIEMENT BUG

Good morning,
in my profile, i have found all the skulls (you can also see in my profile on halowaypoint that i have 13/13 skulls) but i don’t have the ARCHIVIEMENT.
In the game, when i took the last skull (thunderstorm), the game crashed and the mission was stopped. Than i did the mission again but when i took the skull the game Told me:“skull alrealdy found”.

Could you help me??
Thanks, best regards.

Please, someone could help me??
someone know the contact of some “game master” in halo5 that can help me??

thanks.