Funnel plot text does not position itself properly

I'm attempting to produce a stacked funnel plot of activities. The labels are not appearing as expected on the plot.

I'm reposting my question from Stack Overflow here based on the response I got there indicating this might be a bug and it would be of interest here. I did not see a duplicate while searching GitHub.

First my code:

import pandas as pd
import plotly.express as px

stages = ["Initial Landing", "Step 2", "Step 3", "Added to cart", "Purchased"]
regiona_plotly = pd.DataFrame(dict(number=[10866,10543,1067,1032,108], stage=stages))
regionb_plotly = pd.DataFrame(dict(number=[10650,10432,1076,1036,1012], stage=stages))
regiona_plotly['region'] = "Region A"
regionb_plotly['region'] = "Region B"
df = pd.concat([regiona_plotly, regionb_plotly], axis=0)
fig = px.funnel(df, x='number', y='stage', color='region')
fig.update_traces(textposition='auto')
fig.update_layout(autosize=True)
fig.write_image("region_funnel.png")

(Lifted almost entirely from plotly documents)

This code produces an image like so:

Notice that on "Step 3", "Added to cart", and "Purchased" the region A text is scaled very small and inside the bar, but Region B is outside.

I tried updating this line:

fig.update_traces(textposition='outside')

But, with this, I get both values overlapping on the Region B side of the funnel. Also, the text goes outside of the plot on the upper bands.

How can I get text to be the same size and either be within the bar if it fits at the size or outside and on the correct side, if it doesn't?

まず、提供された pandas、plotly.express、update_traces(textposition='auto')、write_image の例を使って、積み上げファネルを再現します。小さい段階でファネルのテキスト位置が Region A と Region B のラベルをどのように処理するかを追跡します。完了の条件は、ラベルが一貫して読みやすいサイズを保ち、正しい側にとどまり、重なったりプロットの外に出たりしないことです。