doom easter egg bug

[Slugged90]

onece you collect all the black ducks you unlock a door on the basement of the vnc tower, this door bring you to an elevator

as soon as you complete the puzzle you unlock the challenge but in my case i wasn't be able to use the gun, (it didn't let me have it for the challenge, so I was unarmed). I restarted the game but after returning the elevator was blocked and I could no longer access the easter egg.
So don't restart the game, take the secret blueprints before. i'm so annoyed because of this game, side quest bugged, side quests already completed that reappear once you restart the game and now this one.

[Grees]

I experiecning the same problem. I am unable to pick the flowers for the Aitor side quest. It says I need to still activate a hide out on my map when I have already done so. Certain NPCs arent appearing to turn in quests. You physically can't complete certain windmills the way they're intended to be completed.
I'm generally not upset from random, semi-infrequent game crashes and falling throug the map, and having zombies or eneimes spawn on top of you, but it's the soft locks that really get me. It's not possible to 100% this game until they fix like half a dozen bugs.

[Beans]

I don’t know if this was intentional but the area with the green square is blocked off keeping me from completing the run and getting the blueprint