当formModel,modal和select组件一起使用时，formModel的校验出现问题（已经有值，校验还是无法通过）

[Weak-chook]

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

Version

1.6.5

Environment

vue 2.6.11 谷歌浏览器84.0.4147.105

Reproduction link

https://www.antdv.com/components/form-model-cn/

Steps to reproduce

1.打开modal组件，操作modal中的select组件
2.select不选择值，然后在其下拉菜单打开状态下，关闭modal
3.再次打开modal组件，select选择值，检验结果无法通过 （使用resetFields重置校验也不行）

What is expected?

select可以通过校验

What is actually happening?

不管是否符合校验规则，都无法通过校验

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[github-actions]

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