diff --git a/lib/class-wp-theme-json-resolver-gutenberg.php b/lib/class-wp-theme-json-resolver-gutenberg.php
index a208cbd726d88e..0b86721fa7baa7 100644
--- a/lib/class-wp-theme-json-resolver-gutenberg.php
+++ b/lib/class-wp-theme-json-resolver-gutenberg.php
@@ -531,3 +531,4 @@ public static function clean_cached_data() {
 }
 
 add_action( 'switch_theme', array( 'WP_Theme_JSON_Resolver_Gutenberg', 'clean_cached_data' ) );
+add_action( 'start_previewing_theme', array( 'WP_Theme_JSON_Resolver_Gutenberg', 'clean_cached_data' ) );