XSS filter hits in search bar

Hi,
Can somebody tell me why the word "Personendaten" ("personal data" in German) triggers the XSS filter when entered in the search bar on our site? I'm using the Smart Search plug-in (com_finder). See below: 

How come it thinks it's an XSS attack, especially when any other search word works fine? 

Thank you, 

Philippe

Hi Jose
I have exported the list. Is it that, what you need?By the way, I've updated the plug-in a few days ago. The problem still exists, and unfortunately, a new one arose. I will start a new topic for this.

Best regards, Philippe