下拉树过滤报错

[Darkbish]

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

Version

undefined

Environment

macos latest, chrome latest

Reproduction link

https://www.antdv.com/components/tree-select-cn/

Steps to reproduce

1. 选中一个值
2. 随便输入搜索值，但是需要没有任何匹配项
3. 点击空白处，关闭下拉框
4. 在打开下拉框，控制台出现异常信息

TypeError: Cannot read property 'domTreeNodes' of null
at c.<anonymous> (index.14e79590.js:1)
at Array.<anonymous> (f1c45352.async.js:2)
at Xt (f1c45352.async.js:2)

What is expected?

没有匹配项时，再次打开下拉树，不报异常信息

What is actually happening?

出现异常信息

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