Well in my case I am using acf/load_field to load form fields dynamically for each post in a loop, similar to this example:
if( $loop->have_posts() ):
while( $loop->have_posts() ): $loop->the_post();
$id = get_the_ID();
if( function_exists('acf_add_local_field_group') ):
acf_add_local_field_group(array(
'key' => 'field_product_item_' . $id,
'title' => 'Product Item #' . $id,
'fields' => array(
array(
'key' => 'field_product_item_group_' . $id,
'type' => 'group',
'sub_fields' => array()
//... dynamic items with default values will be added to this sub_field using acf/load_field
)
)
);
add_filter('acf/load_field/key=field_product_item_group_' . $id, 'load_product_details_form', 20, 3);
So this approach seems to work so far. Anyway I hope this is not prone to problems in the future.
