In the quest mentioned in the title, the puzzle progressed without issue on my end. However, even after gathering all the elements and reporting them to the reporter, the quest does not mark as completed.
I received the reward, and indicators showing increased faction reputation appeared, but the quest remains listed as ongoing in the journal, and I can continue to interact with the reporter multiple times.
The reward does not trigger repeatedly, but no matter which combination of choices I select, the quest remains perpetually incomplete.

I am encountering the same issue. Talking to Archivist Stallworth and reporting the gathered information grants you the reward, followed with additional flavor dialog, including options to get more money or reputation points. After ending the dialog, the quest is still in the list of incomplete side quests. Talking to her again prompts you to once again report the gathered information as if nothing happened, with the third report ending the conversation.