plotly.graph_objects.Sankey docs incorrectly indicates support for legends

I'm trying to display a legend with a Sankey diagram. I gather this is intended to be possible as the docs state this for the name param for plotly.graph_objects.Sankey: Sets the trace name. The trace name appear as the legend item and on hover.

I can't see the legend appearing however, nor the trace name appearing on hover. The following example demonstrates the issue for me:

import plotly.graph_objects as go

go.Figure({
    'data': [
        {'link': {'source': [0, 0, 0, 1, 1, 1, 2, 2],
                  'target': [3, 4, 5, 3, 4, 5, 3, 5],
                  'value': [10, 20, 20, 10, 5, 5, 20, 10]},
              'name': 'Trace 1',
              'node': {'label': ["A", "B", "C", "D", "E", "F"]},
              'type': 'sankey'
             },
    ],
    'layout': {'showlegend': True}
})

I'm using Plotly 4.8.1.

I also came across this Stack Overflow question that makes me wonder if this person is experiencing the same issue as me.