select组件展开折叠时动画卡顿

[ShadowSpeedy]

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

Version

1.3.7

Environment

chrome,Vue2.5.2

Reproduction link

https://github.com/vueComponent/ant-design-vue/

Steps to reproduce

${jack} ${lucy} ${yiminghe}

What is expected?

让动画更加流程

What is actually happening?

在收起选项框时，选中项会默认跳到第一项，然后收起，过程卡顿不流畅，期间会出现只有选项文字没有底色的样式。

[ShadowSpeedy]

[ShadowSpeedy]

[wangxueliang]

请提供复现链接（https://codesandbox.io/s/2wpk21kzvr）方便排查 谢谢

[ShadowSpeedy]

请提供复现链接（https://codesandbox.io/s/2wpk21kzvr）方便排查 谢谢

@wangxueliang

[wangxueliang]

这只是截图，看不到你的代码，很难排查问题出在哪里啊

[ShadowSpeedy]

这只是截图，看不到你的代码，很难排查问题出在哪里啊

你们官方示例也存在这个问题你看一下

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[github-actions]

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