[Suzerain of Sheol]

I don't know if it'll be of any help, I haven't tried the new editor yet, but I have encountered the very first issue in your first post before (usually after being in the editor for too long, or dragging things up and down a lot), and any time it's happened, hard refreshing the page has made it go away, and likewise returned the items to where they should be in the layering.