diff --git a/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
index 0daf176..33c23b6 100644
--- a/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
@@ -93,14 +93,16 @@ public function __construct(ControllerResolverInterface $controller_resolver, Re
    *   The controller event.
    */
   public function onController(FilterControllerEvent $event) {
-    $controller = $event->getController();
+    if ($event->getRequest()->getMethod() == 'GET') {
+      $controller = $event->getController();
 
-    // See \Symfony\Component\HttpKernel\HttpKernel::handleRaw().
-    $arguments = $this->controllerResolver->getArguments($event->getRequest(), $controller);
+      // See \Symfony\Component\HttpKernel\HttpKernel::handleRaw().
+      $arguments = $this->controllerResolver->getArguments($event->getRequest(), $controller);
 
-    $event->setController(function() use ($controller, $arguments) {
-      return $this->wrapControllerExecutionInRenderContext($controller, $arguments);
-    });
+      $event->setController(function () use ($controller, $arguments) {
+        return $this->wrapControllerExecutionInRenderContext($controller, $arguments);
+      });
+    }
   }
 
   /**