Ah, I ran into this issue today as well!

In my particular case, I was able to resolve it by hand-mining a single piece of coal.

Indeed, when I got back to playing, that's the save I continued to play from! Anecdotally, my autosaves are on the order of a fraction of a second, currently. Unfortunately, I have been unable to reproduce the problem. I've attempted to do so by waiting at each step for an autosave to kick in as wel...

I placed a blueprint that uses wooden power poles -- but I didn't have any wooden power poles on me, and wished to place medium power poles instead. I selected a red deconstruction blueprint (a redprint?), to delete only the ghost tiles of the wooden power poles. What follows is a fallible recollect...