Menu "Category Listing" not showing sub menu

Hi,
I updated my testing server with hikashop 2.0.0
I created a Menu "Category listing" with sub menus as "Product listing"
before the update I could see the sub menus from my home page but now I can only see them after I first clicked on the Category listing menu

Simple example with the html output (menu IDs are different because i use 2 sites):

Home page before update :

<ul class="menu">
<li class="item-464 active"><a href="/" >Home</a></li><li class="item-444 deeper parent"><a href="/index.php/products" >Products</a><ul><li class="item-506"><a href="/index.php/products/leather-cases" >Leather cases</a></li></ul></li></ul>

Home page after update :

<ul class="menu">
<li class="item-464 active"><a href="/" >Home</a></li><li class="item-482 parent"><a href="/index.php/products" >Products</a></li></ul>

Category listing page after update :

<ul class="menu">
<li class="item-464"><a href="/" >Home</a></li><li class="item-482 current active deeper parent"><a href="/index.php/products" >Products</a><ul><li class="item-483"><a href="/index.php/products/leather-cases" >Leather cases</a></li></ul></li><ul>

This last example prooves that the sub menu item is included in the menu but only if I clicked on the parent item.

Maybe I am doing something wrong or maybe this is not a normal behavior.

Please help me.

can someone help ?