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/

先使用 issue 中連結的 Plotly JavaScript line-and-scatter 範例重現此行為：選取點，然後將游標移到這些點上。追蹤散佈圖的選取與 hover 行為，並在選取的點顯示與未選取的點相同的相關 tooltip 資料時，將 issue 視為完成。