popover 位置计算错误，每次点击显示的位置发生闪跳

[FishLyn]

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

Version

2.0.0-beta.15

Environment

Vue3

Reproduction link

https://2x.antdv.com/components/popover-cn/

Steps to reproduce

<a-popover
  v-model:visible="noticeVisible"
  arrow-point-at-center
  placement="bottomRight"
  trigger="click"
  :overlayStyle="{
    'width': '300px'
  }"
>
<template #content>
<div class="notice-title">
<span>应用通知</span>
<a-button type="link">清空</a-button>
</div>
<div class="notice-content">
<div class="notice-item">
<div class="content">
<a-avatar size="small">
<template #icon><UserOutlined /></template>
</a-avatar>
<span>这是一条新的通知</span>
</div>
<span>刚刚 15:20</span>
</div>
<div class="notice-item">
<div class="content">
<a-avatar size="small">
<template #icon><UserOutlined /></template>
</a-avatar>
<span>这是一条新的通知</span>
</div>
<span>2020-11-02 15:20</span>
</div>
<a-button type="link">
查看更多
</a-button>
</div>
</template>
<div class="notice">
<a-badge dot color="volcano">
<BellOutlined style="fontSize: 16px; color: #FFFFFF;" />
</a-badge>
</div>
</a-popover>

What is expected?

其中一个位置是正确的，但是另一个位置的 top 和 left 都是有问题的

What is actually happening?

popover 位置计算有问题，每次点击后的位置会发生变化，会在两个位置之间反复横跳

[tangjinzhou]

临时方案： transitionName=""

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.