diff --git a/wp-includes/class-wp-theme-json-resolver.php b/wp-includes/class-wp-theme-json-resolver.php
index 2e6b7523b6..d352cbdcbf 100644
--- a/wp-includes/class-wp-theme-json-resolver.php
+++ b/wp-includes/class-wp-theme-json-resolver.php
@@ -559,7 +559,8 @@ class WP_Theme_JSON_Resolver {
 			_deprecated_argument( __FUNCTION__, '5.9.0' );
 		}
 
-		$result = static::get_core_data();
+		$result = new WP_Theme_JSON();
+		$result->merge( static::get_core_data() );
 		if ( 'default' === $origin ) {
 			$result->set_spacing_sizes();
 			return $result;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 6e43f7d503..185beae893 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-beta3-55447';
+$wp_version = '6.2-beta3-55448';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.