If you kill tucker in amber heights and get his ring (or pickpocket the ring i guess) and then complete the part of "radio free monarch" that makes the gunship crash, and then give the module to MSI over the iconoclasts, and then kill all iconoclasts, it will show "after the battle outside stellar bay, tucker has vanished"

also, when I killed every single iconoclast in their encampment, as well as all their NPCS using lv 150 stealth attacks, it still allowed them to fight MSI after the targeting module was given to MSI. kinda odd but niche bug.

It shows both "after the battle outside stellar bay, tucker has vanished", as well as "hand tuckers ring to agnes in stellar bay; tucker died in amber heights, give his ring to agnes".