When logged out and performed a search, search results are reloaded with '?fbhash=0' appended

Hello,

I am using the last 7.x-3.x-dev version with latest Drupal version. The following ahs been detected; if logged out and search is performed, the search results page is then reloaded, opening this page:

/search/node?fbhash=0

destroying all the search results.
How to prevent reloading with adding the mentioned parameter for certain pages?

The "Append hash on javascript page reload " on admin/structure/fb/settings is checked and I need it checked.

Thanks.