Can-t filter Report by uncategorized or categorization fail

Hi all,

I cant filter the Report for uncategorized or categorization failed Urls.

Scenario:
- Report for websecurity (Available Reports: Urls)
- Setting the filter to the Category 'uncategorized' or 'Categorization failed'

Result:
-An empty report.

Well, I did check if there are some visited (blocked/unblocked) websites in the set timeframe ;) and it works for other categories like 'travel'.

As well as, the automatic report by mail wont give any results in here.

Is this an already known bug? Fixes?

Thx and regards