flopy doesn't export vtk boundary conditions

[oscarfasanchez]

hello, I think this could be a bug.
I'm trying to use paraview for modflow6 visualization, but it doesn't work for boundary conditions, I'm trying to use this code https://github.com/modflowpy/flopy/blob/develop/examples/Notebooks/flopy3_vtk_export.ipynb
but it doesn't export anything for boundary conditions when I use a code like:

gwf.rch.export(pv_folder, fmt='vtk')

other packages work fine(npf, dis,sto etc)
you can see my code in:
https://github.com/oscarfasanchez/Thesis_mf6_pest/blob/master/09_Python/Graphs.py
(commit 82d8186afa796996ade5b80142322ea6f978bc67)

thanks in advance for any help :D

[oscarfasanchez]

I have an irregular structured grid