Only circle symbol seems to work for me in Mapbox

📊 Plotly Python
1

I am trying to plot some symbols on a Mapbox map. However, I found the symbol properties, i.e. colors, sizes etc, can only work with circle symbols. When I use other symbol types, say a triangle or diamond-dot, not only the properties won’t be correct (they will just show as a grey symbol) but also sometimes the symbols won’t even plot or will only plot a part of all of the data points. Here is my code:

mapbox_access_token = open(".mapbox_token").read()
fig = go.Figure()

fig.add_trace(go.Scattermapbox(
        lat=lat,
        lon=lon,
        mode='markers',
        marker=go.scattermapbox.Marker(
            symbol='circle',
            size=10,
            color='blue',
            opacity = 1
        ),
        text=stnNames,
        hoverinfo='text'
    ))

fig.add_trace(go.Scattermapbox(
        lat=evtLat,
        lon=evtLon,
        mode='markers',
        marker=go.scattermapbox.Marker(
            symbol='star',
            size=20,
            color='red',
            opacity = 1
        ),
        text='event',
        hoverinfo='text'
    ))


fig.update_layout(
    title='Selected common stations',
    autosize=True,
    hovermode='closest',
    showlegend=False,
    mapbox=dict(
        accesstoken=mapbox_access_token,
        bearing=0,
        center=dict(
            lat=37.91,
            lon=-77.93
        ),
        pitch=0,
        zoom=3,
        style='light'
    ),
)

fig.show()

newplot
newplot985×525 92.5 KB

See the second fig.add_trace, I have asked the star symbol to be blue, but it will just plot grey.

newplot (2)
newplot (2)985×525 89.6 KB

Now, if I change the symbol from the first fig.add_trace from circles to triangles, not only those triangles cease to be blue, but also only a small part of the original circle symbols got plotted.

I am not sure if there is some bug or if I am doing something wrong? I am running plotly 5.8.0 with Python 3.9.

Thanks for your help.