So I'm at [spoiler]The Witness[/spoiler] fight (and as a solo this campaign is incredibly difficult for me on Legendary) and I managed to get the fight to after having used the shield for the second time but I managed to get strand pulled and immediately died. Now when I go back into the fight and get the proxy boss (Subjugator?) to half health the first time the glowing wall does not open so I cannot get the shield to remove the Subjugator's shield even though my next objective is getting the shield I tried abandoning the mission but after loading back in the exact same thing still happens. I'm completely stuck and incredibly frustrated.