When doing this daily, it showed that I had “completed” the percentage, but only had 7/8 relics. She would no longer spawn the relics, although the accompanying adds would still spawn when she did the “search”.
Edit: Quest abandoned and restarted and it worked correctly.
For what it’s worth, this happened to me yesterday as well. 100% completed, 7/8 artifacts collected. I looked around and found an artifact that I had missed and it completed.
Still bugged, imagine that. Another great way to waste everyone’s fu**ing time. Thank you blizz!