"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" 创建最小 Python 复现，然后将其行为与链接的悬停文本文档进行比较。调查为什么位于同一 X 的重复点在悬停框中只产生一个 Y 值。对于示例情况，如果悬停框显示该 X 对应的每个 Y 轴值，则视为完成。