树型选择控件【未知BUG】

[snwyz]

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

Version

1.6.5

Environment

vue: 2.6.12

Reproduction link

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

Steps to reproduce

Tree树形控件
1、搜索框中搜索一个子项
2、点击确认该搜索子项
3、此时欲想搜索其他子项，搜索框无法点击

What is expected?

搜索点击确定完子项后，点击搜索应该聚焦继续搜索

What is actually happening?

无法点击

---

详细代码如下：

  <a-tree-select
      allow-clear
      placeholder="请选择"
      :dropdownClassName="$style.filterDropdown"
      v-model="select"
      tree-checkable
      :open="openSelectChange"
      :maxTagCount="2"
      show-search
      treeNodeFilterProp="title"
      :tree-data="Options"
      :getPopupContainer="(triggerNode) => triggerNode.parentNode"
  />

这里我使用了你们未开放在文档里的props-[open]属性，导致搜索点击确认完一个子项后，无法接着继续搜索。

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