Hi. We're sorry for the issue you've encountered. This kind of glitch is caused by the Unity Engine and all we can do is to somehow detect it and fix it when it happens. We'll look more into this particular error because a few others have encounter it as well. From what I know the causes that trigger the issue are really hard to met so if you have any save prior to the bug it should not be a problem to resume from there and continue the play. There are really small chances to have the same bug again. Thanks a lot for playing out the demo.