@KalinDrennen -- I see. I believe that you'll have to avoid the situation that causes the maps not to load while making your changes. You can do this by reloading the builder and going right to the first map you need to edit. If you need to adjust another map, you may need to reload the page again and go right to the next map and repeat this as needed. I'm sorry for the inconvenience.
I'm just about to post a note to the community blog that we will be fixing this issue in a patch on Monday.
Owen Evans
Lead Product Engineer | StoryMaps