🐛[BUG]DragSortTable嵌在modal中使用时，拖拽item消失

提问前先看看：

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

### 🐛 bug 描述

### 📷 复现步骤

### 🏞 期望结果

### 💻 复现代码

### © 版本信息

- ProComponents 版本: [e.g. 4.0.0]
- umi 版本
- 浏览器环境
- 开发环境 [e.g. mac OS]

### 🚑 其他信息

No source file, test, or runnable reproduction is named in the report. Start by reproducing DragSortTable inside a modal; done means dragging an item no longer makes it disappear.

Written by the indexing model from the issue text.