If you’re having trouble with bbPress searching in the Canvas theme you can try the following technique to get it resolved.

Download the file bbpress.php from https://gist.github.com/mattyza/1b01583441b11c8d04d0

Place the following code in your functions.php file:

//https://gist.github.com/mattyza/f210cadb7f70188d513d
add_filter( 'template_include', 'woo_custom_maybe_load_bbpress_tpl', 99 );

function woo_custom_maybe_load_bbpress_tpl ( $tpl ) {
if ( function_exists( 'is_bbpress' ) && is_bbpress() ) {
$tpl = locate_template( 'bbpress.php' );
}
return $tpl;
} // End woo_custom_maybe_load_bbpress_tpl()

add_filter( 'bbp_get_template_stack', 'woo_custom_deregister_bbpress_template_stack' );

function woo_custom_deregister_bbpress_template_stack ( $stack ) {
if ( 0 < count( $stack ) ) {
$stylesheet_dir = get_stylesheet_directory();
$template_dir = get_template_directory();
foreach ( $stack as $k => $v ) {
if ( $stylesheet_dir == $v || $template_dir == $v ) {
unset( $stack[$k] );
}
}
}
return $stack;
} // End woo_custom_deregister_bbpress_template_stack()

This will resolve the loop-search.php naming conflict and force bbpress.php to be used on bbpress frontend screens and prevent theme and child themes from being searched for bbpress template files.