I had initial issues with Relevanssi running with bbpress but the searches now come back fine after I unchecked the "Respect exclude_from_search for custom post types" option. Many thanks for that.
However I am now having a problem displaying a page that contains the toggle shortcode around questions and answers. The search comes back and displays "no posts match criteria" but when I go to the actual page concerned the search term is highlighted. It is clearly picking up the search term but not displaying it in the results.
I really hope you can help.