Thank you for the feedback!
The lever in the "Danger Room" unlocks the doors so you can progress to the next room. So doors 1 and 3 are the same as 2 and 4, the rooms are randomized, so it's possible that you can reload the same room which may make it appear the doors don't work.
In hindsight I would re-do this so that you can't enter the same room consecutively.