We can confirm that this issue is also occurring for us on ACF 5.8.3. We performed the following patch to /advanced-custom-fields-pro/includes/acf-field-group-functions.php:1029:
/**
* 20190809 MONKEYPATCH
* There is a bug causing fields to lose their ordering specified in the local-json files.
* The fix below addresses this until Elliot releases a fix.
* See: https://support.advancedcustomfields.com/forums/topic/flexible-content-fields-with-local-json-save-out-of-order/
*/
// // Add field menu_order.
// if( !isset($count[ $field['parent'] ]) ) {
// $count[ $field['parent'] ] = 1;
// } else {
// $count[ $field['parent'] ]++;
// }
// // Only add menu order if doesn't already exist.
// // Allows Flexible Content field to set custom order.
// if( !isset($field['menu_order']) ) {
// $field['menu_order'] = ($count[ $field['parent'] ] - 1);
// }
/**
* 20190809 BEGIN FIX FROM
* https://support.advancedcustomfields.com/forums/topic/flexible-content-fields-with-local-json-save-out-of-order/
*/
// Add field menu_order.
if ( ! isset( $field['parent_layout'] ) ) {
if ( ! isset( $count[ $field['parent'] ] ) ) {
$count[ $field['parent'] ] = 1;
} else {
$count[ $field['parent'] ]++;
}
} else {
if ( ! isset( $count[ $field['parent_layout'] ] ) ) {
$count[ $field['parent_layout'] ] = 1;
} else {
$count[ $field['parent_layout'] ]++;
}
}
// Only add menu order if doesn't already exist.
// Allows Flexible Content field to set custom order
if ( ! isset( $field['parent_layout'] ) ) {
if ( empty( $field['menu_order'] ) ) {
$field['menu_order'] = $count[ $field['parent'] ] - 1;
}
} else {
if ( empty( $field['menu_order'] ) ) {
$field['menu_order'] = $count[ $field['parent_layout'] ] - 1;
}
}
/**
* 20190809 END MONKEYPATCH
* https://support.advancedcustomfields.com/forums/topic/flexible-content-fields-with-local-json-save-out-of-order/
*/
We can confirm that this is the same thing posted by @hube2, and that it fixed the issue for us. Hopefully this information is helpful in developing a permanent fix, or to others who are testing the issue.
