'hovertemplate' not passable as an attribute into a dataframe in a sankey diagram's nodes/links

The 'hovertemplate' attribute is not working when passed into the 'nodes' or 'links' dataframes in a sankey diagram. "Node" and "link" are arguments for the sankey's links and nodes and are of type dataframe which contain arbitrary data for the links and nodes, as well as attributes of links and nodes (see plotly::schema() for a list of all available attributes for each trace). Reprex here is unnecessary since my question is why 'hovertemplate' cannot be passed into the 'nodes' or 'links' as attributes when other attributes such as 'color' and 'hoverinfo' are passable? Is there any workaround to this?

fig <- plot_ly(
      type = "sankey",
      orientation = "h",
      node = nodes, # dataframe which includes sankey trace data and attributes
      link = links, # dataframe which includes sankey trace data and attributes
      valueformat = ".0f")

fig 

実装ファイルもテストも指定されていません。まず plotly::schema() を調べて Sankey のノード属性とリンク属性を確認し、次にノードとリンクのデータフレームがどのように変換されるかを追跡してください。完了条件は、hovertemplate が color および hoverinfo と異なる理由を特定し、確認済みの回避策またはサポートされている動作を文書化することです。