Redirect from Jumpfield causes Error

I have a problem with the RedirectPlugin: when I try to jump to a redirecting page throught the jumpfield, I get the following message:
Cannot redirect to an already visited topic

The URL displayed in the Adressbar is
http://wiki.qephom.de/En/Prefix?redirectedfrom=En.Prefixes&topic=Prefixes

You can test it on http://wiki.qephom.de/En/WebHome when searching for the word "Prefixes"

Maybe I have a mistake in my jumpfield?

<form name="jumpForm" action="%SCRIPTURLPATH{"view"}%/En/%BASETOPIC%"><input id="jumpFormField" title="%MAKETEXT{"Jump"}%" type="text" class="foswikiInputField foswikiDefaultText" name="topic" value="" size="18" /><noscript>&nbsp;<input type="submit" class="foswikiButton" size="5" name="submit" value="%MAKETEXT{"Jump"}%" />&nbsp;</noscript>
   </form>