go.Sankey not respecting (x,y) coordinates

The code below

import dash_core_components as dcc
import dash_html_components as html
import plotly.graph_objects as go
from dash import Dash

app = Dash(__name__)


def sankey():
    x = [0.0, 0.0, 0.0, 0.0, 0.0, 0.5, 0.5, 0.5, 0.5, 1.0]
    y = [
        0.21630069,
        0.47642676,
        0.54677235,
        0.62167333,
        0.74199201,
        0.29388136,
        0.73906564,
        0.89679547,
        0.95161119,
        0.29388135,
    ]
    label = list("ABCDEFGHIJ")

    source = [0, 1, 0, 1, 2, 2, 2, 2, 0, 1, 2, 2, 3, 4, 5, 6, 6, 8]
    target = [5, 5, 2, 2, 5, 5, 7, 7, 6, 6, 6, 6, 5, 5, 9, 9, 8, 9]
    value = [
        4.03086075e-02,
        3.13536457e-01,
        4.74989358e-03,
        4.82905398e-02,
        2.57156646e-03,
        2.55178406e-02,
        1.15108889e-03,
        1.17027262e-02,
        7.78313638e-03,
        7.07743914e-02,
        1.02723822e-03,
        1.10699730e-02,
        1.43875830e-01,
        6.19524093e-02,
        3.81934471e-01,
        2.05828238e-01,
        6.19685055e-02,
        2.53269630e-17,
    ]

    fig = go.Figure(
        data=[
            go.Sankey(
                arrangement="fixed",
                node=dict(
                    # thickness=20,
                    # line=dict(color="black", width=0.5),
                    label=label,
                    x=x,
                    y=y,
                ),
                link=dict(source=source, target=target, value=value),
            )
        ]
    )
    return fig


app.layout = html.Div([dcc.Graph(figure=sankey())])

if __name__ == "__main__":
    app.run_server(debug=True)

generates

which is not expected as:

• nodes A,B,C,D and E have all same x coordinates (should be aligned on same vertical line)
• nodes A,B,C,D,E should be ordered from top to bottom as they have increasing y coordinates

I may have misunderstood the (x,y) coordinates logic or it is a bug...

Libraries version:
plotly==4.9.0
dash==1.16.3
dash-core-components==1.12.1
dash-html-components==1.1.1

まず、記載された plotly、Dash、コンポーネントのバージョンで提供された Sankey の例を実行し、その後、arrangement="fixed" が指定されたノードの x 値と y 値をどのように適用するかを確認します。ノード A–E が垂直に整列し、上から下へ y の昇順で表示され、報告された挙動に対するカバレッジがあることを完了条件とします。