The saving/resuming is indeed quite bugged. I did resume with a lot of my progress, but I think I'm in a different spot, lots of items are back in their place again, password needs to be re-entered, all my notes are gone, assembled items are separated again, etc ... I think I can just pick up again, but I'm not sure yet and my motivation to finish it is also killed.
Definitely something to look into, because you made such a good escape game, the bugged saving really feels like a disappointment. Feels to me that you are just saving the state of some variables and not all of them.