Visual bug for nodes with fixed position in Sankey plot

There seems to be a visual bug for nodes with fixed positions that makes it hard to differentiate between incomming and outgoing links.
It would be great if this would be solves the same way it is solved with loops. In my example the left side that has no loop therefore would likely be read as a link from node B to A. The right side however has a loop and solves the issue by implementing a visual that shows clearly that the link from node D to C is outgoing at D terefore on the right side and incomming at C therefore on the left side.

  fig = go.Figure(data=[go.Sankey(
      arrangement="snap",
      node=dict(
          label=["A", "B", "C", "D", "E", "F", "G", "H"],
          x=[0.3, 0.4, 0.6, 0.7],
          y=[0.5, 0.5, 0.5, 0.5]
      ),
      link=dict(
          source=[1, 2, 3],
          target=[0, 3, 2],
          value=[1, 1, 1]
      ))])
  fig.show()

まず、提供された Python Sankey の再現コードを実行し、例に示されているループ描画と固定位置のリンクを比較します。Sankey 描画のエントリーポイントを追跡し、各ノードでリンクの方向がどのように伝達されるかを特定します。完了の条件は、ループ描画を後退させることなく、報告されたレイアウトで入力リンクと出力リンクを視覚的に区別できることです。