Scattermapbox text font family does not change

Also posted here: https://stackoverflow.com/questions/68541008/plotly-scattermapbox-text-font-family-does-not-change

I want to add text to my map in a specific font. Even when I tested with basic HTML-fonts, the text in the map wouldn’t change. However, I could change the hover font. What went wrong? Or is it a bug?

fig = go.Figure(go.Scattermapbox(
            lat=[51.555606],
            lon=[5.090819],
            mode="markers+text",
            showlegend=False,
            text=['Test'],
            textposition='top right',
            textfont=dict(size=25, color='black', family='Courier New'),
            hoverlabel=dict(font=dict(family='Courier New', size=25)),

            marker=dict(size=20)))

fig.update_layout(mapbox=dict(zoom=11.5, center={"lat": 51.57, "lon": 5.07}, accesstoken=token))

Output:

Output figure with hover, which uses Courier New: