Slicer Hierarchy with Search selection

I have an issue with my slicer selection, when using hierachy branching. In this example, I have my part ClassID and under it I have my Partnum. I've enabled the search function. If i search for a specific property, a list of ClassID and PartNums are showned, but when I select a parent ClassID, it's basically showing me every single child (partnum) for that selected parent, no longer considering my property specification. As if the search bar was rendered useless once a parent is selected.

As of now, I had to purchase the licence from the visual store : Hierarchical Filter / Slicer - xViz which that one is working properly.