Filtering a long list of items from reports: minor bug?

In the "Filters" Tab of a profile Edit interface I need to insert more than 600 items...they are all organizations names I don't want to include in my reports (which have ca. 8000 entries). For inserting them I make copy and paste of a "one row" string built with the opportune rules. The operation works and I have right results but the edit box, filled with the string appears empty (see img) or just like the font was white and so invisible respect to background color. The names are there because the reports are clean. Another side effect is that the specific "exclude" filter in the filter list appears empty i.e. there is only the check box with no name to its right. If I create manually the same filter excluding only few names, the string and the filter name are correctly shown.
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