DragSortTable的拖拽排序，合并单元格之后还能用吗？现在是只拖动成功了已合并好的其中一行🧐[问题]

提问前先看看：

https://github.com/ryanhanwu/How-To-Ask-Questions-The-Smart-Way/blob/main/README-zh_CN.md

### 🧐 问题描述

### 💻 示例代码

### 🚑 其他信息

就像这种，合并之后拖动只有第一行在动

Start with the DragSortTable row-dragging entry point and reproduce the reported case using merged cells. Check how the merged rows are represented during a drag; done means the complete merged group moves together rather than only its first row.

Written by the indexing model from the issue text.