Wanna preface this comment by saying I'm addicted to this game and will be violently recommending it to everyone I know. This game is EVERYTHING to me, and I hope reporting this bug helps with the development. I want to make fan art when I have the time because the three characters I've met so far are lovely.
My sibling arranged three pieces over this 4.02m space, and while trying to rearrange them, clicked back. When she returned to the fabric cutter, the two other pieces were gone, the scissors wouldn't cut the remaining piece, and we couldn't drag it back to the right bar. A simple save & quit fixed the issue, but removed the pinned fabric pieces on the mannequin. 