React final form calculate makes dirty form in async initalValues

[rzkhosroshahi]

Are you submitting a bug report or a feature request?

I guess feature request.

What is the current behavior?

Hi, thanks for making this handy form package :)
I have a component that makes initialValue from API and also I'm using final form calculate to change some field values. in the initial loading after data fetched calculate function make the form to dirty.

What is the expected behavior?

I expected when initalValues change by final form calculate in this situation my form don't be dirty

Sandbox Link

https://codesandbox.io/s/38rorvr8kq

What's your environment?

"react-final-form": "^4.1.0",
"react-final-form-arrays": "^2.0.3",
"final-form": "^4.12.0",
"final-form-arrays": "^1.1.2",
"final-form-calculate": "^1.3.1",