Upload Issues – /admin-ajax.php

I’m also having the same redirect issue, but in my case, it only DOESN’T happen when I try uploading a file (which I’ve made not required in the form). No matter if I set the form_layout to be post or post-media, if I don’t include a file, submitting the form redirects to /admin-ajax.php rather than my success page. The post is successfully submitted, but I’m not getting any admin notification either, and I strongly suspect the two are related.