"x unified" Does not show all data info at same X

Environment:

Python 3.9.5
plotly.py v5.6.0
VS Code Jupyter Environment

How it is now

fig = px.scatter(result_df, x=[1, 2, 2, 3], y=[1, 2, 3, 4])
fig.update_traces(mode="markers", hovertemplate=None)
fig.update_layout(hovermode="x unified")
fig.show()

As shown above, the hover box only displayed 1 y-axis value.

How it should be

The hover box should display all y-axis values at the same X, even if they are the same type, in my example scatter plot.
As demonstrated in the document, plotly has the capability to show all values at the same X. But unfortunately it only works when there are another data dimension involved.

先使用 px.scatter、update_traces 和 hovermode="x unified" 建立最小 Python 重現，然後將其行為與連結的懸停文字文件進行比較。調查為什麼位於同一個 X 的重複點在懸停框中只產生一個 Y 值。對於範例情況，如果懸停框顯示該 X 對應的每個 Y 軸值，即表示完成。