title: Plotly Scattermapbox lines not showing but no error message
body: <p>I've written the following code that maps straight lines with a start and end latitude and longitude. While the code runs without an error message, the figure generated does not show any of the lines despite showing the legend.</p>
  <pre><code>fig = go.Figure(
      [
          go.Scattermapbox(
              name=g[0],
              lat=np.array(g[1][[&quot;lat.start&quot;, &quot;lat.end&quot;]]),
              lon=np.array(g[1][[&quot;lon.start&quot;, &quot;lon.end&quot;]]),
              mode=&quot;lines&quot;,
          )
          for g in df.groupby(&quot;attribute&quot;)
      ]
  )
  </code></pre>
  <p>I've looked through the documentation of Scattermapbox, but nothing suggests that <code>lat</code> and <code>lon</code> cannot take arrays, so I'm not sure why they are not showing up.</p>