'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 

Non è indicato alcun file di implementazione né alcun test. Inizia ispezionando plotly::schema() per gli attributi dei nodi e dei link Sankey, quindi traccia come vengono convertiti i dataframe dei nodi e dei link; il lavoro è completato quando si determina perché hovertemplate differisce da color e hoverinfo e si documenta una soluzione alternativa confermata o il comportamento supportato.