AJAX form submission (inline success) doesn't reevaluate form on corrections

[frispete]

After failing to validate once, fixing the input and pushing Submit doesn't reevaluate the form again.

This happens with both Firefox 80 and chromium 85 on a local install as well as with the official demo site.

[stevepiercy]

The expected behavior should be covered in the deformdemo functional tests, but obviously falls short.

I would gladly accept a pull request to fix the functionality and tests to cover it.