Dont take this wrong, why are you posting a statement like that here?
It probably a game bug and either you would go to the creator for Ragnarok support. or Ark. I would suggest, Ragnarok. They do have a Discord Channel
because someone I have spoke to who played this everyday since it came out said there is a cheat code to bring missing artifacts back, or to reset the artifacts so that's why I post here if anyone knew it. he did play the pc where I am on the xbox