[Bug Report]表单验证select自定义异步校验规则会被调用2次

[yezhouyipian]

Environment

windows

Reproduction link

https://run.iviewui.com/ugbClJn0

Steps to reproduce

表单验证自定义异步校验规则，会被调用2次

What is expected?

调用1次

What is actually happening?

调用2次