Table Sort is not working on panels ipe fieldable panels panes

Same here.

If you use the inline entity form on a fieldable panels pane field the sorting doesn't work.

I did the following to make it work in a custom module.

/**
 * Implements hook_form_FORM_ID_alter().
 */
function MYMODULE_form_fieldable_panels_panes_fieldable_panels_pane_content_type_edit_form_alter(&$form, &$form_state) {
  if ($form['#bundle'] == 'MY_BUNDLE') {
    $form['buttons']['return']['#ief_submit_all'] = TRUE;
    $form['field_MY_FIELD'][LANGUAGE_NONE]['#element_validate'] = array('inline_entity_form_save_row_weights');
  }
}

Recently I updated from 1.3 to 1.5, and I don't have this problem anymore. So somewhere along the line this has probably been fixed!