Pagination control in <a-table> the problem of abnormal animation of the function button showing the number of items per page

[ll60]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

3.0.0-alpha.14

Environment

操作系统: macOS12.0.1、浏览器: Chrome 版本 96.0.4664.55（正式版本） (arm64)、VUE版本: 3.2.16

Reproduction link

Steps to reproduce

1. 点击[5/page]会弹出选项，点击某个选择项，如：[10/page]，会出现弹窗从下面的位置变换到上面位置，再消失的动画。
2. 首次进入页面后，如果分页组件下面距离不足时，点击控制每页显示条数的哪个按钮，动画会往上展示，但是会出现，先往下展示，再往上展示的诡异动画。（我屏幕时1920*1080，每页条数调整为10时，距离底部稍微有点距离时，会出现这种情况）

What is expected?

修复的分页组件中控制每页显示条数按钮动画异常的问题

What is actually happening?

的分页组件中控制每页显示条数按钮，展开和点击，动画异常。

[github-actions]

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