show tooltip when hovering over selected points on scatter plot

Hello,

I’ve encountered an issue when using Plotly’s scatter plot. When I select specific points on the scatter graph and then try to hover over those selected points, the tooltip fails to appear. This behavior is inconsistent with how tooltips normally function on the plot, where they display the relevant data for each point when hovered over.

Steps to reproduce:

1. Create a scatter plot with multiple data points.
2. Select one or more points on the graph.
3. Hover over the selected points.
4. Notice that the tooltip does not appear for the selected points.

you can find an example in Plotly's documentation :

https://plotly.com/javascript/line-and-scatter/

首先，使用 issue 中链接的 Plotly JavaScript line-and-scatter 示例重现该行为：选择点，然后将鼠标悬停在这些点上。跟踪散点图的选择和 hover 行为，并在选中的点显示与未选中的点相同的相关 tooltip 数据时，将 issue 视为完成。