legend_tracegroupgap doesn't work when legend_traceorder is used

Note: to reproduce, see here

The problem

Baseline

long_df = px.data.medals_long()

fig = px.bar(long_df, x="nation", y="count", color="medal", title="Long-Form")
fig.update_layout(width=680, height=480,)
fig.show()

works just fine:

Increasing the gap works

long_df = px.data.medals_long()

fig = px.bar(long_df, x="nation", y="count", color="medal", title="Long-Form")
fig.update_layout(autosize=False, width=680, height=480, legend_tracegroupgap=50)
fig.show()

also works fine

Increasing the gap & reversing doesn't work

long_df = px.data.medals_long()

fig = px.bar(long_df, x="nation", y="count", color="medal", title="Long-Form Input")
fig.update_layout(width=680,height=480, legend_traceorder="reversed", legend_tracegroupgap=50)
fig.show()

gives

Commencez par la reproduction Colab liée et comparez legend_traceorder="reversed" avec legend_tracegroupgap=50 dans les points d’entrée de Plotly Python. Suivez la manière dont ces deux propriétés de mise en page sont traitées ensemble. C’est terminé lorsque l’écart configuré reste visible lorsque l’ordre des traces de la légende est inversé.