[Paraview] issue with savescreenshot in pvpython when having two renderviews

[Jens Dahl Kunoy]

Hi,
I want to compare two vtk files by having two render views and dump these
two renderviews into a single image file. The py script recorded by trace
works from GUI but not from the command line using pvpython. Using pvpython
the second renderview has no data and there is also other artefacts. You
can see the difference in the attached two files.

I put it up as an issue here:
https://gitlab.kitware.com/paraview/paraview/issues/17938

Any ideas?

BR
Jens
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