Magento – Magento2: Category id not showing at backend

Ok You shoud modify the function $this->getStoreCategories()

$_current_category = Mage::registry('current_category');
$path = $_current_category->getPath(); //get the path of where you are
$ids = explode('/', $path);
//now you have something like root category/base store category/first level 
if (isset($ids[2])) { //you should add some more complex lookout
    $topParent = Mage::getModel('catalog/category')->setStoreId(Mage::app()->getStore()->getId())->load($ids[2]);
//topParent is the ralph loren category even if you are in one of its children cat
}

Of course this is only a start point for your coding but you should have alla elements in it.

Finally I figure out this issue and fixed it.

I had created a custom theme on magento version 2.0 and overridden few default templates/js files of core Luma theme.

After few days, that instance was corrupted and hence I've installed latest Magento version i.e. 2.1.1 and used my custom theme there. Everything working fine except this issue. So I looked into it and found that Magento Team has done some changes in core templates/js etc. Then I found the culprit is messages.js at app\design\frontend\Vendor\theme_name\Magento_Theme\web\js\view. I've replaced that file, deployed content and Magento showing success/failure messages now.

Hope someone may help this.

Thanks.