hexahedron20. Incorrect convertation into vtu file about meshio HOT 1 OPEN

import meshio
import numpy
import os

BASE_DIR = os.getcwd()

hex20_corrected = meshio.Mesh(
    [
        [0.0, 0.0, 0.0],
        [1.0, 0.0, 0.0],
        [1.0, 1.0, 0.0],
        [0.0, 1.0, 0.0],
        [0.0, 0.0, 1.0],
        [1.0, 0.0, 1.0],
        [1.0, 1.0, 1.0],
        [0.0, 1.0, 1.0],
        [0.5, 0.0, 0.0],
        [1.0, 0.5, 0.0],
        [0.5, 1.0, 0.0],#10
        [0.0, 0.5, 0.0],
        [0.5, 0.0, 1.0],# first wrong node
        [1.0, 0.5, 1.0],
        [0.5, 1.0, 1.0],
        [0.0, 0.5, 1.0],
        [0.0, 0.0, 0.5],
        [1.0, 0.0, 0.5],
        [1.0, 1.0, 0.5],
        [0.0, 1.0, 0.5],
    ],
    [("hexahedron20", [numpy.arange(20)])],
)

hex20_corrected.write(
    os.path.join(BASE_DIR, "result_corrected.vtu"),
)