Jacob's Rest - Timor Station: To skip the first door button is a softlock
The rail nuke starter button that also opens the nearby door is skippable by destroying the door. This way I can still reach the finish zone but can't win, as the button is a required objective, and by this point the way back is closed. Let's just make the door indestructible? Now that the button opens the door immediately, there's no point destroying it even in a speedrun.
There's something to it. I think it could be changed, although theoretically destroying the door and letting a fast character like Wildcat or Faith power up might be a faster approach.
But... the mission can still be completed (and without the warhead countdown!) by using the jetpack to jump over the rockfall to get back to the button and power up.