diff --git a/core/modules/locale/lib/Drupal/locale/LocaleConfigSubscriber.php b/core/modules/locale/lib/Drupal/locale/LocaleConfigSubscriber.php
index cb9be73..11fa899 100644
--- a/core/modules/locale/lib/Drupal/locale/LocaleConfigSubscriber.php
+++ b/core/modules/locale/lib/Drupal/locale/LocaleConfigSubscriber.php
@@ -134,7 +134,9 @@ public function getLocaleConfigName($name, Language $language) {
   static function getSubscribedEvents() {
     $events['config.context'][] = array('configContext', 20);
     $events['config.load'][] = array('configLoad', 20);
-    $events[KernelEvents::REQUEST][] = array('onKernelRequestSetDefaultConfigContextLocale', 20);
+    // Set the priority above the one from the RouteListener (priority 32)
+    // so ensure that the context is cleared before the routing system steps in.
+    $events[KernelEvents::REQUEST][] = array('onKernelRequestSetDefaultConfigContextLocale', 48);
     return $events;
   }
 }