The Sleep "thing" is just a warning about exhaustion bug, and how it can mess up your sleep schedule if you save and quit at any time that isn't between 4-8AM in game.
Reloading was for the door, - which involves the saving and quitting - which is why I mentioned the Sleep related stuff. - I can only think, of reloading as something that would help the door though, or maybe a line in the save-file code - but I wouldn't know which, and I wouldn't know if that might do more harm than good - like it may never return kinda harm -
or it might be like the fix for tree-dupe bug, and only get rid of the duplicates but not the one spawned by engine.
Whole lotta mights and not sures, Sorry I dunno how to help more. If I experience it myself, I'll probably know better what causes/fixes it.