Defaults not working for grouped filter with multiple selections

Create a view and configure a filter with the following options set

• Expose this filter to visitors, to allow them to change it
• Grouped filters
• Allow multiple selections
• Widget type = Select
• Tick at least one box in the default column.

Works so far: when viewing the view, the items that were set as default are checked by default.

Now add a second exposed filter. Don't think the settings matter too much so long as it is exposed. Still works, see screenshot Right.png.

Now change the order of these two filters and the bug occurs: when viewing the view, no items are checked by default. See screenshot Wrong.png.

Export of the view in this final not-working state:

$view = new view();
$view->name = 'test';
$view->description = '';
$view->tag = 'default';
$view->base_table = 'node';
$view->human_name = 'Test';
$view->core = 7;
$view->api_version = '3.0';
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */

/* Display: Master */
$handler = $view->new_display('default', 'Master', 'default');
$handler->display->display_options['title'] = 'Test';
$handler->display->display_options['use_more_always'] = FALSE;
$handler->display->display_options['access']['type'] = 'perm';
$handler->display->display_options['cache']['type'] = 'none';
$handler->display->display_options['query']['type'] = 'views_query';
$handler->display->display_options['exposed_form']['type'] = 'basic';
$handler->display->display_options['pager']['type'] = 'full';
$handler->display->display_options['pager']['options']['items_per_page'] = '10';
$handler->display->display_options['style_plugin'] = 'table';
/* Field: Content: Title */
$handler->display->display_options['fields']['title']['id'] = 'title';
$handler->display->display_options['fields']['title']['table'] = 'node';
$handler->display->display_options['fields']['title']['field'] = 'title';
$handler->display->display_options['fields']['title']['alter']['word_boundary'] = FALSE;
$handler->display->display_options['fields']['title']['alter']['ellipsis'] = FALSE;
/* Filter criterion: Content: Author uid */
$handler->display->display_options['filters']['uid']['id'] = 'uid';
$handler->display->display_options['filters']['uid']['table'] = 'node';
$handler->display->display_options['filters']['uid']['field'] = 'uid';
$handler->display->display_options['filters']['uid']['value'] = array(
  0 => '1',
);
$handler->display->display_options['filters']['uid']['group'] = 1;
$handler->display->display_options['filters']['uid']['exposed'] = TRUE;
$handler->display->display_options['filters']['uid']['expose']['operator_id'] = 'uid_op';
$handler->display->display_options['filters']['uid']['expose']['label'] = 'Author uid';
$handler->display->display_options['filters']['uid']['expose']['operator'] = 'uid_op';
$handler->display->display_options['filters']['uid']['expose']['identifier'] = 'uid';
$handler->display->display_options['filters']['uid']['expose']['remember_roles'] = array(
  2 => '2',
  1 => 0,
  3 => 0,
  4 => 0,
);
/* Filter criterion: Content: Body (body) */
$handler->display->display_options['filters']['body_value']['id'] = 'body_value';
$handler->display->display_options['filters']['body_value']['table'] = 'field_data_body';
$handler->display->display_options['filters']['body_value']['field'] = 'body_value';
$handler->display->display_options['filters']['body_value']['group'] = 1;
$handler->display->display_options['filters']['body_value']['exposed'] = TRUE;
$handler->display->display_options['filters']['body_value']['expose']['operator_id'] = 'body_value_op';
$handler->display->display_options['filters']['body_value']['expose']['label'] = 'Body (body)';
$handler->display->display_options['filters']['body_value']['expose']['operator'] = 'body_value_op';
$handler->display->display_options['filters']['body_value']['expose']['identifier'] = 'body_value';
$handler->display->display_options['filters']['body_value']['expose']['multiple'] = TRUE;
$handler->display->display_options['filters']['body_value']['is_grouped'] = TRUE;
$handler->display->display_options['filters']['body_value']['group_info']['label'] = 'Body (body)';
$handler->display->display_options['filters']['body_value']['group_info']['identifier'] = 'body_value';
$handler->display->display_options['filters']['body_value']['group_info']['multiple'] = TRUE;
$handler->display->display_options['filters']['body_value']['group_info']['default_group_multiple'] = array(
  1 => '1',
);
$handler->display->display_options['filters']['body_value']['group_info']['group_items'] = array(
  1 => array(
    'title' => 'Green',
    'operator' => 'contains',
    'value' => 'Green',
  ),
  2 => array(
    'title' => 'Red',
    'operator' => 'contains',
    'value' => 'Red',
  ),
);

/* Display: Page */
$handler = $view->new_display('page', 'Page', 'page');
$handler->display->display_options['path'] = 'test';
$handler->display->display_options['menu']['type'] = 'normal';
$handler->display->display_options['menu']['title'] = 'Test view';
$handler->display->display_options['menu']['weight'] = '0';
$handler->display->display_options['menu']['name'] = 'main-menu';
$handler->display->display_options['menu']['context'] = 0;
$handler->display->display_options['menu']['context_only_inline'] = 0;