When you use the shift-unstack, you can't type in a bigger number then the size of the stack at the moment you have started the command, even if the stack is still growing (eg. mining)

this was not true before the "unstack by volume" was added.

back then you could type in any number, and hit the ok button once the stacksize had grown to typed amount. If you hit the ok button to early, it did just move the whole stack at once.

so why this backstep? bug or (stupid) feature?

(once that is answered, please move to the right forum section)