diff --git a/core/misc/drupal.init.es6.js b/core/misc/drupal.init.es6.js
index 686a062c9790..4f7961dd38f7 100644
--- a/core/misc/drupal.init.es6.js
+++ b/core/misc/drupal.init.es6.js
@@ -21,7 +21,7 @@ document.documentElement.className += ' js';
       document.removeEventListener('DOMContentLoaded', listener);
     };
     if (document.readyState !== 'loading') {
-      callback();
+      setTimeout(callback, 0);
     } else {
       document.addEventListener('DOMContentLoaded', listener);
     }
diff --git a/core/misc/drupal.init.js b/core/misc/drupal.init.js
index 9b158bab3018..81eb78e0209d 100644
--- a/core/misc/drupal.init.js
+++ b/core/misc/drupal.init.js
@@ -19,7 +19,7 @@ document.documentElement.className += ' js';
     };
 
     if (document.readyState !== 'loading') {
-      callback();
+      setTimeout(callback, 0);
     } else {
       document.addEventListener('DOMContentLoaded', listener);
     }