This is done via embedded script in stage 200. To me this change makes no sense at all.
The item has no weight, no value and it stays useful even after completing the quest, because there are more caged Deathclaws around. Without the flag however, it is shown in the player inventory and just clutters the view. In my opinion, it would be better to revert this change.
For others who also don't like the change - you can add the flag back with the following command:
Code: Select all
SetQuestObject DLC03SignalScrambler 1