What does feedback property do on Form.Input? #532

More than an issue this is a question:

I'm passing the formik validation errors and the API fetching errors as Form.Input error and feedback properties, no any problem till here.

The problem comes when I pass the feedback and it is not showed in the page:

When there is a formik validation error, it is showed normally and the input is also styled as it requires:

And It is because if there is an error, the input receives the is-invalid, and state-invalid classes are passed to the control group, while feedback just gets the text but does not change the form control style:

So, in order to get also the server errors, we had to pass it feedback error also to the error property:

So, finally, what is the idea of the feedback property?

Thanks.