BUG: FSE template-parts replaced in Multisite searches

[dannyreaktiv]

Describe the bug

The Good: I’ve gotten the cross-site searching working with ElasticSearch on a WP Multisite that’s running an FSE theme.

The Bug: sometimes, when $query->set( 'site__in', 'all' ); is on, the Header FSE template-part gets replaced with the post_content from another site’s post with the same ID. The Header template-part’s post_id is 510, but the content that is rendered on the front-end is from the 510 of another site on the network.

The fix was to add $query->set( 'cache_results', false );, as shown below.

Is this expected behavior?

function elasticsearch_network_search( $query ) {
 … if ( is_admin() || ! $query->is_main_query() || ! $query->is_search() ) { return; }
$query->set( 'site__in', 'all' );
$query->set( 'cache_results', false ); 

}
 add_action( 'pre_get_posts', 'elasticsearch_network_search');

Steps to Reproduce

On a multisite setup, have a search result include the post ID of a FSE template part used on the page

Screenshots, screen recording, code snippet

No response

Environment information

No response

WordPress and ElasticPress information

No response

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