As the title says above, a phantom piece is being created. This is not a serious problem as refreshing the page fixes it, but it's something that has occurred more than once, where the image of a piece appears where one is not. Any ideas why, or anything I should do? Other than just refresh and ignore it (Sometimes I don't notice the new piece wasn't there before right away, and my tactical mind gets stuck because a new rook or something is covering squares that were unguarded before.)