Bazzinga!!!!!!!
It may not be the most elegant fix but I made a new shortcode for “Post PDF Export”. I added the below to “post-pdf-export/post-pdf-export.php”, which you can get to by clicking edit under “Post PDF Export” on the plugin page:
<?php
//[custom1]
function custom1_func( $atts ){
$custom1 = get_field('field_name');
return $custom1;
}
add_shortcode( 'custom1', 'custom1_func' );
?>
The “field_name” is the field name of the ACF field. Paste [custom1] into your template loop on “Post PDF Export” template manager in WordPress and ya done, ACF fields in a PDF!!!