wp_get_nav_menu_items retrieving empty array

[furi3r]

Hi Guys, I found out this problem and it is a bit weird, I tried to debug, but it looks everything on my side is correct, and is just the function failing.

Environment:
WP_DEBUG on
PHP logs clear
WP latest

Situation:
I use a WP menu on the header. Every template calls to the_header() and inside header.php I call to :
wp_nav_menu(array(

'theme_location' => 'main',
'container' => 'nav',
'menu' => 'main' ));

It works like a charm everywhere but in a specific archive of a custom taxonomy (it works fine for others custom taxonomies).
Trying to debug I empty the full template and leave only the_header() the_footer() to avoid conflicts, still happens the same.

I started to debug using other functions related:

In every archive I get the proper array with the menu in the last call, but in the one failing i get:

var_dump(get_nav_menu_locations());
array(5) { primary?=> int(122) bottom?=> int(124) secondary?=> int(0) mobile-menu?=> int(122) lang?=> int(125) }

var_dump(is_nav_menu(122));
bool(true)

var_dump(wp_get_nav_menu_items('main'));
array(0) { }

Any ideas?

[furi3r]

Sorry my WP version is 3.9

[furi3r]

Update:

This is happening in more archives when im performing a search in it.

This archive /xxxx/ is an archive of a taxonomy.
I've just realised the menus are working when loading /xxxx/

But if i perform a search query /xxxx/?search=xxx is when the menus are not loading.

Could be some interference between how this menu works and the fact im using a custom search query?

[chriscct7]

Can't replicate

[jesseisrad]

I CAN reproduce this.

I'm trying to work with this function in the footer template and it works fine on a post page, but not on any taxonomic archive. Returns an empty array on those pages.

I'm on WP 4.8

[jesseisrad]

apologies, my issue and maybe that of the op is related to this: ​https://wordpress.org/support/topic/wp-nav-menu-dissapears-in-category-pages-1/

basically there's a pre_get_posts somewhere that needs to have 'nav_menu_item' post-type added to it.

[welcher]

Unable to reproduce on trunk. Closing but if this is reproducible, please provide instructions.