Chart behaves identical whether it's dumb (no state) or whether it has state

L’issue ne mentionne aucun fichier du dépôt ni aucun test ; commencez par localiser le passage de la documentation concernant le composant « dumb » et comparez-le aux deux exemples React. Reproduisez le comportement signalé de pan, zoom, rerender et resize, puis clarifiez l’avertissement ou documentez la distinction attendue une fois le comportement prévu confirmé.

The docs state that: This is a "dumb" component that doesn't merge its internal state with any updates. This means that if a user interacts with the plot, by zooming or panning for example, any subsequent re-renders will lose this information unless it is captured and upstreamed via the onUpdate callback prop.
But the following two pieces of code behave identically:

• without state:

function StackedAreaChart({) {
  const layout = {
    showlegend: true,
    legend: {
      x: 0,
      y: -0.15,
      orientation: "h",
      traceorder: "normal",
      yanchor: "top",
    },
    autosize: true,
    margin: { pad: 10, b: 10, l: 40, r: 40, t: 80 },
  };

  const plotData = [...someData]

  return (
    <div style={{ height: 650 }} data-cy="stacked-area-chart">
      <Plot
        data={plotData}
        layout={layout}
        style={{ width: "100%", height: "100%" }}
        useResizeHandler
      />
    </div>
  );
}
export default StackedAreaChart;

• and with state:

function StackedAreaChart() {
  const [chart, setChart] = useState({
    data: [],
    layout: {
      showlegend: true,
      legend: {
        x: 0,
        y: -0.15,
        orientation: "h",
        traceorder: "normal",
        yanchor: "top",
      },
      xaxis: { range: [2000, 2019] },
      autosize: true,
      margin: { pad: 10, b: 10, l: 40, r: 40, t: 80 },
    },
    config: { responsive: true },
  });

  useEffect(() => {
    const plotData = [...someData];

    setChart((prevState) => ({
      ...prevState,
      data: [...plotData],
    }));
  }, [setChart, data]);

  return (
    <div style={{ height: 650 }} data-cy="stacked-area-chart">
      <Plot
        data={chart.data}
        layout={chart.layout}
        config={chart.config}
        style={{ width: "100%", height: "100%" }}
        useResizeHandler
      />
    </div>
  );
}
export default StackedAreaChart;

I can pan and zoom and then double click to return to its initial state on both codes. I can also modify the viewport width, making the chart to resize, while zoomed in and the chart still behaves perfectly.

I don't understand the warning in the documentation.
Am I doing something wrong ?