Hierarchical graph inlines branches

[Hexorg]

I have a control flow graph that's rendered as

Using

pub type FunctGraphView<'a> = GraphView<
    'a,
    (),
    (),
    Directed,
    DefaultIx,
    DefaultNodeShape,
    DefaultEdgeShape,
    LayoutStateHierarchical,
    LayoutHierarchical,
>;

The nodes, however, are on different paths:

I haven't had a chance to look at the LayoutHierarchical algorithm, but I think it makes some assumptions that don't hold in my case.