WP Nav Menu Dissapears in Category Pages! [2]

Hi, I have same problem that was already posted and solved, but little different conditions. That guys used custom post types or queue filters which caused the problem, I dont use such and still have the same:
I call wp_nav_menu from header and sidebar, and it works everywhere except category page.
None of their solutions work for me.
So i’m trying to get nav_menu_items manually

$items = get_objects_in_term( 28, 'nav_menu' );
$itposts = array();
foreach ($items as $it) {
	$temppost = get_post( $it );
	$itposts[] = $temppost->ID;
}
$args = array('post_type' => 'nav_menu_item');
$args['post__in'] = $itposts;

echo '<br />__WP_Query__<br />';
$the_query = new WP_Query( $args );
if ( $the_query->have_posts() ) {
	echo '<ul>';
	while ( $the_query->have_posts() ) {
		$the_query->the_post();
		echo '<li><a href="' . get_permalink() . '">' . get_the_title() . '</a></li>';
	}
	echo '</ul>';

..And I get same result then – in category page WP_Query is empty when in other pages it works

Maybe anyone had this and can share solution?

WP Nav Menu Dissapears in Category Pages! [1]
another closed topic