active form stopped displaying because style of 'display: none' assigned to it

My only active form stopped displaying. After deactivating all other plugins I finally noticed the form code was in my page (via the shortcode), but the form had an inline element style of 'display: none' assigned to it, so the form just wasn't showing.

I edited form_display.php to change:
$style = self::has_conditional_logic($form) ? "style='display:none'" : "";
To:
$style = self::has_conditional_logic($form) ? "style='display:block'" : "";

This seems like a temporary fix, so I need a permanent solution as to why an Active form is disalbed.

Form page:
http://sitesubscribe.com/contact/

What's weird is:
-I 'did' have conditional logic for a field, but the conditional check box somehow got unchecked (should that make the entire form not display?)
-the form used to display, and without me editing the form, it suddenly stopped displaying

I'll have to reconfigure the conditional logic and then see if it works correctly from there.

Thanks.