diff --git a/Neos.Neos/Classes/Controller/Backend/ModuleController.php b/Neos.Neos/Classes/Controller/Backend/ModuleController.php
index cefecc042d7..135664fed6d 100644
--- a/Neos.Neos/Classes/Controller/Backend/ModuleController.php
+++ b/Neos.Neos/Classes/Controller/Backend/ModuleController.php
@@ -15,7 +15,6 @@
 namespace Neos\Neos\Controller\Backend;
 
 use Neos\Flow\Annotations as Flow;
-use Neos\Flow\Mvc\ActionResponse;
 use Neos\Flow\Mvc\Controller\ActionController;
 use Neos\Flow\Mvc\Dispatcher;
 use Neos\Flow\Security\Context;
@@ -103,14 +102,18 @@ public function indexAction(array $module)
 
         $moduleResponse = $this->dispatcher->dispatch($moduleRequest);
 
-        if ($moduleResponse->getRedirectUri() !== null) {
-            $this->redirectToUri($moduleResponse->getRedirectUri(), 0, $moduleResponse->getStatusCode());
+        if ($moduleResponse->hasHeader('Location')) {
+            // Preserve redirects see b57d72aeeaa2e6da4d9c0a80363025fefd63d813
+            // todo just return $moduleResponse and not merge with $this->response?
+            $this->redirectToUri($moduleResponse->getHeaderLine('Location'), 0, $moduleResponse->getStatusCode());
         } elseif ($moduleRequest->getFormat() !== 'html') {
+            // Allow ajax request with json or similar dd7e5c99924bf1b8618775bec08cc4f2cb1a6d2a
+            // todo just return $moduleResponse and not merge with $this->response?
             $mediaType = MediaTypes::getMediaTypeFromFilename('file.' . $moduleRequest->getFormat());
             if ($mediaType !== 'application/octet-stream') {
-                $this->controllerContext->getResponse()->setContentType($mediaType);
+                $this->response->setContentType($mediaType);
             }
-            return $moduleResponse->getContent();
+            return $moduleResponse->getBody();
         } else {
             $user = $this->partyService->getAssignedPartyOfAccount($this->securityContext->getAccount());
 
@@ -118,7 +121,7 @@ public function indexAction(array $module)
 
             $this->view->assignMultiple([
                 'moduleClass' => implode('-', $modules),
-                'moduleContents' => $moduleResponse->getContent(),
+                'moduleContents' => $moduleResponse->getBody()->getContents(),
                 'title' => $moduleRequest->hasArgument('title')
                     ? $moduleRequest->getArgument('title')
                     : $moduleConfiguration['label'],
diff --git a/Neos.Neos/Classes/Fusion/PluginImplementation.php b/Neos.Neos/Classes/Fusion/PluginImplementation.php
index eae2242db7d..dd93365d9e9 100644
--- a/Neos.Neos/Classes/Fusion/PluginImplementation.php
+++ b/Neos.Neos/Classes/Fusion/PluginImplementation.php
@@ -171,10 +171,17 @@ public function evaluate(): string
 
         // We need to make sure to not merge content up into the parent ActionResponse
         // because that would break the Fusion HttpResponse.
-        $content = $pluginResponse->getContent();
-        $pluginResponse->setContent('');
+        $content = $pluginResponse->getBody()->getContents();
 
-        $pluginResponse->mergeIntoParentResponse($parentResponse);
+        // hacky, but part of the deal. We have to manipulate the global response to redirect for example.
+        // transfer possible headers that have been set dynamically
+        foreach ($pluginResponse->getHeaders() as $name => $values) {
+            $parentResponse->setHttpHeader($name, $values);
+        }
+        // if the status code is 200 we assume it's the default and will not overrule it
+        if ($pluginResponse->getStatusCode() !== 200) {
+            $parentResponse->setStatusCode($pluginResponse->getStatusCode());
+        }
 
         return $content;
     }
diff --git a/Neos.Neos/Classes/Service/Controller/AbstractServiceController.php b/Neos.Neos/Classes/Service/Controller/AbstractServiceController.php
index 25bcb5cd135..a212f1ac725 100644
--- a/Neos.Neos/Classes/Service/Controller/AbstractServiceController.php
+++ b/Neos.Neos/Classes/Service/Controller/AbstractServiceController.php
@@ -14,18 +14,19 @@
 
 namespace Neos\Neos\Service\Controller;
 
+use GuzzleHttp\Psr7\Response;
 use Neos\ContentRepository\Core\SharedModel\User\UserId;
 use Neos\Flow\Annotations as Flow;
 use Neos\Flow\Exception as FlowException;
 use Neos\Flow\Log\ThrowableStorageInterface;
 use Neos\Flow\Log\Utility\LogEnvironment;
 use Neos\Flow\Mvc\ActionRequest;
-use Neos\Flow\Mvc\ActionResponse;
 use Neos\Flow\Mvc\Controller\ActionController;
 use Neos\Flow\Mvc\Exception\ForwardException;
 use Neos\Flow\Mvc\Exception\StopActionException;
 use Neos\Neos\Controller\BackendUserTranslationTrait;
 use Neos\Neos\Domain\Service\UserService;
+use Psr\Http\Message\ResponseInterface;
 
 /**
  * Abstract Service Controller
@@ -85,13 +86,8 @@ protected function errorAction(): never
     /**
      * Catch exceptions while processing an exception and respond to JSON format
      * TODO: This is an explicit exception handling that will be replaced by format-enabled exception handlers.
-     *
-     * @param ActionRequest $request The request object
-     * @return ActionResponse $response The response, modified by this handler
-     * @throws StopActionException
-     * @throws \Exception
      */
-    public function processRequest(ActionRequest $request): ActionResponse
+    public function processRequest(ActionRequest $request): ResponseInterface
     {
         try {
             $response = parent::processRequest($request);
@@ -102,14 +98,16 @@ public function processRequest(ActionRequest $request): ActionResponse
                 throw $exception;
             }
             $exceptionData = $this->convertException($exception);
-            $response = new ActionResponse();
-            $response->setContentType('application/json');
-            if ($exception instanceof FlowException) {
-                $response->setStatusCode($exception->getStatusCode());
-            } else {
-                $response->setStatusCode(500);
-            }
-            $response->setContent(json_encode(['error' => $exceptionData], JSON_THROW_ON_ERROR));
+            $body = json_encode(['error' => $exceptionData], JSON_THROW_ON_ERROR);
+            $response = new Response(
+                status: $exception instanceof FlowException
+                    ? $exception->getStatusCode()
+                    : 500,
+                headers: [
+                    'Content-Type' => 'application/json'
+                ],
+                body: $body
+            );
             $this->logger->error(
                 $this->throwableStorage2->logThrowable($exception),
                 LogEnvironment::fromMethodName(__METHOD__)