Yes, you are correct, sorry. We discovered and fixed it, but new upload was only ready now :) EDIT: If you still have the game open and don't want to start over you can place it on the "I" to finish the puzzle. 🙈
I had closed it, but now played it through from the start :) There is still a matter where you can drag a piece out of the playing area, but then cannot drag it back, though it's unlikely to happen