Only return taxonomies that exist in current loop. Using it on another taxonomy terms archive page.

filter_taxonomy_existing_loop.php

	<?php
	while (have_posts()) : the_post();
	   $taxonomy = 'your_taxonomy'; // change this to your taxonomy
	   //$terms = wp_get_post_terms( $post->ID, $taxonomy, array( "fields" => "ids" ) );
	   $terms = wp_get_post_terms( $post->ID, $taxonomy, array( "fields" => "slugs" ) );
	   if( $terms ) $all_terms = array_merge($all_terms, $terms);
	endwhile;
	
	if ($all_terms) :
	   $all_terms = array_unique($all_terms);
	   //$terms = trim( implode( ' ', (array) $all_terms ), ' ,' );
	   echo '<ul>';
	   		//wp_list_categories( 'title_li=&taxonomy=' . $taxonomy . '&include=' . $terms );	            			   
	   		//echo $terms; 
	   		foreach ( $all_terms as $termname ) { 
	   		
	   			echo '<li>' . $termname . '</li>'; 
	   			
	   			}
	   
	   echo '</ul>';
	endif;
	?>