product details page - category mappings input box search issue

on category mappings on product details page, when we start typing a category name, it appears in a selectable dialogue box

but it only finds the name of a top level category

eg
http://admin-demo.nopcommerce.com/Admin/Product/Edit/21


in category mappings box,
start typing 'accessories' and the accessories category and it's subcategories list appears
but
start typing 'clothes' and nothing appears


the auto complete should search all child categories

Thanks a lot for reporting. I've just created a work item