Are keys changed or bug?

Sry if it is a change that is longer ingame because I did not play for over 6months but I played a game just now and found a purple key (the 5sec key) in a box and when I used it on the hatch with 1 gen remaining and 1 person dead I could escape but then the hatch closed after me.

If its intended then WOW!!! NICE! FINALY!

And if its a bug pls let it!

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