Comment (by Roland Haas):

The issue is that Hilbert also changed how the derivative order for the Christoffels in the GRHydro source terms is set. This used to be via ADMMacros::spatial_order but became GRHydro::sources_spatial_order. This was already found to be an issue in #2119 (see https://bitbucket.org/einsteintoolkit/tickets/issues/2119#comment-50396578)

There is also some code in #2120 that would avoid this from happening again, and which I will commit unless objected.

This is the result of adding:

GRHydro::sources_spatial_order = 4

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2175/test-single-stable-neutron-star-example