For my next trick... while the game window loads in, the tile with 9 on top gets dragged out of bounds to an unreachable spot. Apparently left of the game window where its X and maybe even Y positions would be negative.
Makes the puzzle unwinnable, unless RNG lets you bring it back by asking for a Hint. Move pieces around to get good Hint RNG, since it depends on your puzzle progress.
Needs this verification input played back first.