map fields issue with contour based slice

Using vtk-m to calculate a slice using a contour of a dist field to a plane.

The slice result is in the right place, however the other mapped fields don't have expected values.

To reproduce:

Configure + Build this CMake project with a VTK-m install: 2023_08_25_slice_test.tar.gz

Run:

./slice_test ../zinput.vtk

I tested using 2.1.0rc.

Here is a comparison of slicing the example data and plotting a field with VisIt on the left, and VTK-m on the right: