setx and setY do not work in the pane (Javafx)

Question

I’m having a problem setting the x and y position of an Imageview in a Javafx Pane. It is a loop code and, the first time the method is called, it arrow the img object at the specific coordinates (last two lines), but from the second time, Java ignores this position. Here is the code:

    private void embarque_para_vagao(){
        int dif, aux, dif2;

        if(Integer.parseInt(nome) <= 4 ){
            aux = Integer.parseInt(nome);
            dif = -40;
            dif2 = 5 - Integer.parseInt(nome);
        }

        else{
            aux = Integer.parseInt(nome)-4; 
            dif = 75;
            dif2 = Integer.parseInt(nome)-1;
        }

        PathTransition entra_fila = new PathTransition();
        entra_fila.setNode(img);
        entra_fila.setDuration( Duration.seconds( TempoEmbarque ) );

        Polyline line = new Polyline(
            60+42*(aux+dif2), -210-42*3,
            60+42*(aux+dif2-vagao.CadeirasOcupadas), -210-42*3,
            60+42*(aux+dif2-vagao.CadeirasOcupadas), -210-42*4
        );
        entra_fila.setPath(line);
        entra_fila.play();
        while(entra_fila.getStatus() == Animation.Status.RUNNING){
            System.out.println(entra_fila.getStatus());
        }
        Platform.runLater(() -> {
            ancVagao.getChildren().add(img);
        });
        img.setX(-188);
        img.setY(-70);
    }