Like I said, the only reason this should happen is if the ajax request fails, or never happens. Is the JavaScript running?
1) Is acf_form_head() before get_header() and run before any html is output?
2) Does your theme contain call to wp_head()
3) Does your theme contain call to wp_foot()
4) Are your deferring the loading of JavaScript or otherwise altering the way that JavaScript is loaded on the page?
