diff --git a/Neos.ContentGraph.DoctrineDbalAdapter/src/DoctrineDbalContentGraphProjection.php b/Neos.ContentGraph.DoctrineDbalAdapter/src/DoctrineDbalContentGraphProjection.php
index c05f6399f6d..fb795a1b723 100644
--- a/Neos.ContentGraph.DoctrineDbalAdapter/src/DoctrineDbalContentGraphProjection.php
+++ b/Neos.ContentGraph.DoctrineDbalAdapter/src/DoctrineDbalContentGraphProjection.php
@@ -66,6 +66,7 @@
 use Neos\ContentRepository\Core\Projection\ContentGraph\Timestamps;
 use Neos\ContentRepository\Core\Projection\ProjectionInterface;
 use Neos\ContentRepository\Core\Projection\ProjectionStatus;
+use Neos\ContentRepository\Core\Projection\WithMarkStaleInterface;
 use Neos\ContentRepository\Core\SharedModel\Node\NodeAggregateClassification;
 use Neos\ContentRepository\Core\SharedModel\Node\NodeAggregateId;
 use Neos\ContentRepository\Core\SharedModel\Node\NodeName;
@@ -78,7 +79,7 @@
  * @implements ProjectionInterface<ContentRepositoryReadModel>
  * @internal but the graph projection is api
  */
-final class DoctrineDbalContentGraphProjection implements ProjectionInterface
+final class DoctrineDbalContentGraphProjection implements ProjectionInterface, WithMarkStaleInterface
 {
     use ContentStream;
     use NodeMove;
@@ -168,6 +169,12 @@ public function reset(): void
 
         $this->checkpointStorage->acquireLock();
         $this->checkpointStorage->updateAndReleaseLock(SequenceNumber::none());
+        $this->getState()->forgetInstances();
+    }
+
+    public function markStale(): void
+    {
+        $this->getState()->forgetInstances();
     }
 
     public function getCheckpointStorage(): DbalCheckpointStorage
diff --git a/Neos.ContentRepository.Core/Classes/ContentRepositoryReadModel.php b/Neos.ContentRepository.Core/Classes/ContentRepositoryReadModel.php
index 66f56033ce0..c8bb3d6cb1c 100644
--- a/Neos.ContentRepository.Core/Classes/ContentRepositoryReadModel.php
+++ b/Neos.ContentRepository.Core/Classes/ContentRepositoryReadModel.php
@@ -16,6 +16,7 @@
 
 use Neos\ContentRepository\Core\Projection\ContentGraph\ContentGraphInterface;
 use Neos\ContentRepository\Core\Projection\ProjectionStateInterface;
+use Neos\ContentRepository\Core\Projection\WithMarkStaleInterface;
 use Neos\ContentRepository\Core\SharedModel\Exception\WorkspaceDoesNotExist;
 use Neos\ContentRepository\Core\SharedModel\Workspace\ContentStream;
 use Neos\ContentRepository\Core\SharedModel\Workspace\ContentStreamId;
@@ -57,11 +58,10 @@ public function __construct(
     /**
      * To release all held instances, in case a workspace/content stream relation needs to be reset
      *
-     * @internal Should only be needed after write operations (which should take care on their own)
+     * @internal Must be invoked by the projection {@see WithMarkStaleInterface::markStale()} to ensure a flush after write operations
      */
     public function forgetInstances(): void
     {
-        // todo do we need to reintroduce the cache??? https://github.com/neos/neos-development-collection/pull/5246
         $this->contentGraphInstancesByWorkspaceName = [];
         $this->workspaceInstancesByName = [];
         $this->contentStreamInstancesById = [];
diff --git a/Neos.ContentRepository.TestSuite/Classes/Behavior/Features/Bootstrap/ProjectedNodeTrait.php b/Neos.ContentRepository.TestSuite/Classes/Behavior/Features/Bootstrap/ProjectedNodeTrait.php
index 84f92067e16..cbd7721db64 100644
--- a/Neos.ContentRepository.TestSuite/Classes/Behavior/Features/Bootstrap/ProjectedNodeTrait.php
+++ b/Neos.ContentRepository.TestSuite/Classes/Behavior/Features/Bootstrap/ProjectedNodeTrait.php
@@ -81,8 +81,6 @@ public function iGetTheNodeAtPath(string $serializedNodePath): void
     public function iExpectANodeIdentifiedByXToExistInTheContentGraph(string $serializedNodeDiscriminator): void
     {
         $nodeDiscriminator = NodeDiscriminator::fromShorthand($serializedNodeDiscriminator);
-        $contentRepositoryReadModel = $this->currentContentRepository->projectionState(ContentRepositoryReadModel::class);
-        $contentRepositoryReadModel->forgetInstances();
         $matchingWorkspace = $this->currentContentRepository->getWorkspaces()->find(
             static fn (Workspace $workspace) => $workspace->currentContentStreamId->equals($nodeDiscriminator->contentStreamId)
         );