Landing Page - adjust_landing_page_query overwrites existing post_type query-var

[dhavalgshah]

adjust_landing_page_query function uses pre_get_posts action to add its post type to query-vars. However, it doesn't check for existing values and overwrites them. Thus causing conflicts with other plugins/themes.

https://github.com/elementor/elementor/blob/bd8b98c3aa39570e20e75021e7fafaf926bafbc4/modules/landing-pages/module.php#L343

The above line should be:

// Create the post types property as an array and include out CPTs in it.
$query_post_types = $query->get( 'post_type');
$query_post_types[] =  self::CPT;

[erikjandelange]

To keep it in on one line it alsow can be done by:

$query_post_types = array_merge( $query->get('post_type'), [self::CPT] );