Python calculator doesn't work for Lagrange hexahedron cell types

In regard to the below discourse post: https://discourse.paraview.org/t/vorticity-and-gradient-calculation-numerics-gives-wrong-result/1514?u=vrkssai

The filter "Gradient of Unstructured data" and Vorticity Calculation using python calculator for Lagrange Hexahedron Grids give erroneous results.The steps and files to reproduce are in the post.