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Newton Scheme FAILED to converge - Following up #16120

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The fe_map.C warnings are coming from inverse_map. Typically that means a badly twisted element where the mapping Jacobian goes singular, but we do have an outstanding issue with pyramids that can be triggered near their apex vertex: libMesh/libmesh#2749

The flags_were_consistent failure means that there's an element which has one refinement flag on one processor but a different refinement (or lack-of-refinement) flag on another processor. If you're using a libMesh flagging routine then this is probably a bug in libMesh. If you're using a homebrewed flagging routine that you're certain is correct on local elements, you can call MeshRefinement::make_flags_parallel_consistent() to sync your…

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@roystgnr
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@fdkong
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