When I use the "tree view" of the "catalog service" (not simple service), the filter is not working

How to reproduce it :

• I created 4 projects : 3 of them are in a first category, the last is in another category
• In the demo site, insert into the main zone the catalog service (not the simple one) using the tree view and check only the first category

> the 4 projects appears

Expected behavior :

> only the projects that are into the first category should appears.