Reassigning Yaxis Labels Inconsistent When Using hoversubplots & hovermode set

I've been having an issue when you define two xaxes and populate three yaxes per xaxis (in a 2x3) grid while setting "hoversubplots= "axis"", with "hovermode= "xunified"". I've found I cannot rename two of the 6 Yaxis labels.

import plotly.graph_objects as go
from datetime import date
from plotly import subplots
import random

def get_test_data():
    x_data, y_data = [], []
    for v in range(30):
        x_data.append(date(2024, 10, v+1))
        y_data.append(random.random())
    return x_data, y_data

data= []
for yaxis in range(1,7):

    if yaxis % 2:
        xaxis = "x1"
    else:
        xaxis= "x2"

    x, y = get_test_data()
    data.append(go.Scatter(x= x, y= y, xaxis= f"{xaxis}", yaxis= f"y{yaxis}", name= f"Test{yaxis}y{yaxis}"))

titles = ["First","Second","Third","Fourth","Fifth","Sixth"]
layout = dict(
    hoversubplots= "axis",
    hovermode= "x unified",
    title= "Test Plot",
    font= dict(
        family= "Courier New, monospace",
        size= 14,
        color= "rgba(255,255,255,1)"),
    plot_bgcolor= "rgba(0,0,0,1)",
    paper_bgcolor= "rgba(0,0,0,1)",
    grid= dict(rows=3, columns=2),
    )

figure= subplots.make_subplots(rows= 3, cols=2, subplot_titles= titles, specs= [[{},{}] for i in range(3)])
figure.add_traces(data[0])
figure.add_traces(data[1])
figure.add_traces(data[2])
figure.add_traces(data[3])
figure.add_traces(data[4])
figure.add_traces(data[5])
figure["layout"][f"yaxis1"]["title"] = "yaxis1"
figure["layout"][f"yaxis2"]["title"] = "yaxis2"
figure["layout"][f"yaxis3"]["title"] = "yaxis3"
figure["layout"][f"yaxis4"]["title"] = "yaxis4"
figure["layout"][f"yaxis5"]["title"] = "yaxis5"
figure["layout"][f"yaxis6"]["title"] = "yaxis6"

figure.update_layout(layout)
figure.update_xaxes(gridcolor="rgba(80,80,80,1)", showticklabels= True)
figure.update_yaxes(gridcolor="rgba(80,80,80,1)", autorange= True, showticklabels= True)

figure.show()

Exécutez la reproduction Python fournie et inspectez la mise en page de la figure générée ainsi que le comportement du survol pour les six axes y avec hoversubplots="axis" et hovermode="x unified". Suivez la raison pour laquelle deux titres d’axe y attribués ne sont pas affichés, et considérez l’issue comme terminée lorsque les six libellés peuvent être renommés de manière cohérente et que le comportement est couvert par un test de régression.