Select component has scrollbar issue when wrapped by Spin component

[Charbo23]

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

Version

2.1.0

Environment

Windows 10.0.19041.867 Chrome 89.0.4389.90 Vue 3.0.3

Reproduction link

Steps to reproduce

1.Wrap Select component in a Spin, the data for selecting must be enough to cause overflow
2.Choose an option then make any other updates on the page (such as typing words in the input box)
3.Open the dropdown menu again, the scrollbar is missing, the dropdown cannot be scrolled also

What is expected?

The dropdown menu can be scrolled whenever it should be

What is actually happening?

The dropdown menu cannot be scrolled after other updates are made

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There is a solution effective for now: add "v-if" directive on the parent node of the Select component, the expression can even be simply"true".

[guibwl]

我也有类似的问题，我的情况是，当 a-select-option > 8 且 < 11 条时，选中第一条以外的 a-select-option 会导致无法滚动。

[github-actions]

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