Async blur validation not triggered after changes done by field-level validation

[lpeliberty]

Are you submitting a bug report or a feature request?

Bug

What is the current behavior?

Imagine we have a field with a field-level validation and an async blur validation : when a field-level validation update the error status, the async validation is not called. It could be good only if the update made by the field-level validation have found an error, not when the error is removed !

What is the expected behavior?

Async blur validation should be called if Field-level validation does not detect an error.

Sandbox Link

https://codesandbox.io/embed/redux-form-template-5961u

Example : type 'paul' in username field. At the end, blur is triggered but in redux devtools, we only saw action @@redux-form/UPDATE_SYNC_ERRORS and not @@redux-form/START_ASYNC_VALIDATION

Why ? Because, if the username length is not equal to 4, there's an error. So the first type you type p, the error invalid length is updated in store form.fieldLevelValidation.syncErrors.username. When you type a and u, the state does not change and after that, when you type l, the state is updated and set the error in form.fieldLevelValidation.syncErrors.username to null. And it seems that this behavior blocks the async blur validation because a change is done.

What's your environment?

Latest redux-form 8.2.6