Overridden menu item status lost when menu is saved / synced

I have the same issue. Here is my way to reproduce.

1/ Create a term in a vocabulary synced with menu.
2/ Set term as enabled.
3/ Menu item is created and enabled.
4/ Disable term
5/ Menu item is still enabled

There is two issues in code :
1/ In TaxonomyMenu::buildDefinition(), menu link should take care of term status.

// There is no enabled key here.
$link += [
      'id' => $this->buildMenuPluginId($term),
      'title' => $term->label(),
      'description' => $term->getDescription(),
      'menu_name' => $menu_id,
      'expanded' => $this->expanded,
      'metadata' => [
        'taxonomy_menu_id' => $taxonomy_menu_id,
        'taxonomy_term_id' => $term_id,
      ],
      'route_name' => $term_url->getRouteName(),
      'route_parameters' => $term_url->getRouteParameters(),
      'load arguments'  => $arguments,
      'parent' => $menu_parent_id,
      'provider' => 'taxonomy_menu',
      'class' => 'Drupal\taxonomy_menu\Plugin\Menu\TaxonomyMenuMenuLink',
    ];

2/ In update, TaxonomyMenuMenuLink::updateLink(), is called with $persist at false. When term is updated, some updates are passed to menu link like title or weight changes, but not status.

I'll make a MR to make menu link follow term status changes.