InputNumber handle onChange when onBlur. But it is not change.

[cxyxc]

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

Reproduction link

Steps to reproduce

use these props:

precision={2}
formatter={value => `${value}%`}
parser={value => value.replace("%", "")}

Focus InputNumber, do nothing and move out of focus. Number is not change but onChange is runing.

What is expected?

When number not change, not handle onChange Event.

What is actually happening?

Number not change, but onChange is runing.

Environment	Info
antd	3.18.1
React	16.9.0
System	win10
Browser	70.0.3538.110