Two query blocks on home template (FSE) breaks the second one

[acaballerog]

On a site we have a home.html template where we display a custom query with sticky posts before the main query (inherited). We also filter the main query to do not display sticky posts again. Since we updated to 6.1.3 the second query skips the first post (that is the most recent non-sticky post).

After some debugging I realize that the $wp_query->current_post value is 0 after the first loop instead of -1, causing it to skip the first item (index 0) on the $wp_query->posts array. Following the logic in wp-includes I cannot find any obvious change introduced on 6.1.3 to produce this error.

I’ve reproduced the issue on a fresh new installation of wp (with 6.2 version):

• I have created several posts (duplications of Hello world)
• I have crated a new category.
• I have assigned three posts to the new category
• I have modified the home template (on the site editor) to add a custom query before the main one, where I display the three posts from the new category

Result with wp 6.1.2

When I update to 6.1.3, the “last one” disapears:

I have found a quick fix that solves it:

<?php
add_action('loop_end', function($query){
        if($query->is_home){
            global $wp_query;
            //sets the $wp_query->current_post to -1  
            $wp_query->current_post = -1;
        }
});

But I assume this may potentially affect more users and should be fixd on the core.

BTW: Using two custom queries doesn’t work for us because we want to keep the default pagination settings with the /page/2 urls