I've gotten everything in the temple, the codex page, the ingot, and of course the hidden ones armor piece, I've checked online to make sure I've collected everything, and I have. The problem is that the icon is still on the map as if the bureau is not completed. It's not harming my game file or progress in any way, it's a purely cosmetic hindrance on the map. All the other bureaus I've done are no longer there, so it's just bugging me that it's just THERE, watching me, taunting me. I wasn't able to find any other issues like this online, so I'm leaving this comment here in hopes that I can find a solution, or at least the closure of knowing it's permanent if that happens to be the case.