Hoversubplots=axis not working with make_subplots

Initially reported on the Plotly forum.

Using make_subplots means that the hoversubplots=“axis” will not work correctly.

Sample code that produces the error:
Codepen.

import plotly.graph_objects as go
from plotly import data
from plotly.subplots import make_subplots

df = data.stocks()


fig = make_subplots(rows=3, cols=1, shared_xaxes=True, vertical_spacing=0.03)
layout = dict(
    hoversubplots="axis",
    title="Stock Price Changes",
    hovermode="x",
    grid=dict(rows=3, columns=1),
)

fig.add_trace(go.Scatter(x=df["date"], y=df["AAPL"], name="Apple"), row=1, col=1)
fig.add_trace(go.Scatter(x=df["date"], y=df["GOOG"], name="Google"), row=2, col=1)
fig.add_trace(go.Scatter(x=df["date"], y=df["AMZN"], name="Amazon"), row=3, col=1)
fig.update_layout(layout)
fig.show()

Expected behavior should be the same as when using the Plotly docs hover on subplots example, where hover labels appear for all charts:
Codepen.

Start by reproducing the provided Python example with make_subplots and the hoversubplots="axis" layout, then compare it with the linked Plotly documentation example. Trace how subplot axes and hover settings are generated; done means hover labels appear for all charts as shown in the expected example.