Upon saving and then selecting ‘Quit to Main Menu’ the error occurred. See screenshot. I don;t believe it is repeatable. So this bug report might need more corroboration from other players to be useful.
If needed the save file I was coming out of was the one I have uploaded for the ‘maximum scaffold height’ bug I have just logged.
Steps to reproduce:
Version Number and Mods in use:
release 700 (x64)