diff --git a/Source/CesiumRuntime/Private/Cesium3DTileset.cpp b/Source/CesiumRuntime/Private/Cesium3DTileset.cpp
index bb8afd695..50b5324ab 100644
--- a/Source/CesiumRuntime/Private/Cesium3DTileset.cpp
+++ b/Source/CesiumRuntime/Private/Cesium3DTileset.cpp
@@ -12,6 +12,7 @@
 #include "Cesium3DTilesSelection/TilesetOptions.h"
 #include "Cesium3DTilesetLoadFailureDetails.h"
 #include "Cesium3DTilesetRoot.h"
+#include "CesiumActors.h"
 #include "CesiumAsync/IAssetResponse.h"
 #include "CesiumBoundingVolumeComponent.h"
 #include "CesiumCamera.h"
@@ -2087,6 +2088,8 @@ void ACesium3DTileset::PostLoad() {
                                 // actor to have correct BodyInstance values.
 
   Super::PostLoad();
+
+  CesiumActors::validateActorFlags(this);
 }
 
 void ACesium3DTileset::Serialize(FArchive& Ar) {
diff --git a/Source/CesiumRuntime/Private/CesiumActors.cpp b/Source/CesiumRuntime/Private/CesiumActors.cpp
index c8c212478..03fb9fe6b 100644
--- a/Source/CesiumRuntime/Private/CesiumActors.cpp
+++ b/Source/CesiumRuntime/Private/CesiumActors.cpp
@@ -23,3 +23,35 @@ glm::dvec4 CesiumActors::getWorldOrigin4D(const AActor* actor) {
   const FIntVector& originLocation = world->OriginLocation;
   return glm::dvec4(originLocation.X, originLocation.Y, originLocation.Z, 1.0);
 }
+
+void CesiumActors::validatePublicFlag(UObject* object, const FString& label) {
+  //
+  // From an Epic Engine Developer...
+  // RF_Public means that the object is an asset, so it should be only set for
+  // worlds, textures, meshes, etc. This flags essentially says it's ok to
+  // have a reference to public objects from other packages (with the
+  // exception of worlds). Actors are not assets since they are part of a
+  // level which is part of a world, etc. that's why they should not key the
+  // public flag.
+  //
+  // In earlier versions of cesium-unreal, this flag may have been set
+  //
+  if (object->HasAnyFlags(RF_Public)) {
+    UE_LOG(
+        LogCesium,
+        Display,
+        TEXT("Clearing invalid RF_Public flag on %s"),
+        *label);
+    object->ClearFlags(RF_Public);
+  }
+}
+
+void CesiumActors::validateActorFlags(AActor* actor) {
+  FString label = FString("actor: ") + *actor->GetName();
+  validatePublicFlag(actor, label);
+}
+
+void CesiumActors::validateActorComponentFlags(UActorComponent* component) {
+  FString label = FString("actor component: ") + *component->GetName();
+  validatePublicFlag(component, label);
+}
diff --git a/Source/CesiumRuntime/Private/CesiumActors.h b/Source/CesiumRuntime/Private/CesiumActors.h
index 23ff60f45..960876e3a 100644
--- a/Source/CesiumRuntime/Private/CesiumActors.h
+++ b/Source/CesiumRuntime/Private/CesiumActors.h
@@ -28,4 +28,10 @@ class CesiumActors {
    * @return The world origin
    */
   static glm::dvec4 getWorldOrigin4D(const AActor* actor);
+
+  static void validateActorFlags(AActor* actor);
+  static void validateActorComponentFlags(UActorComponent* component);
+
+private:
+  static void validatePublicFlag(UObject* object, const FString& label);
 };
diff --git a/Source/CesiumRuntime/Private/CesiumCartographicPolygon.cpp b/Source/CesiumRuntime/Private/CesiumCartographicPolygon.cpp
index 925090845..19489b772 100644
--- a/Source/CesiumRuntime/Private/CesiumCartographicPolygon.cpp
+++ b/Source/CesiumRuntime/Private/CesiumCartographicPolygon.cpp
@@ -1,6 +1,7 @@
 // Copyright 2020-2021 CesiumGS, Inc. and Contributors
 
 #include "CesiumCartographicPolygon.h"
+#include "CesiumActors.h"
 #include "CesiumUtility/Math.h"
 #include "Components/SceneComponent.h"
 #include "StaticMeshResources.h"
@@ -79,3 +80,9 @@ void ACesiumCartographicPolygon::MakeLinear() {
     this->Polygon->SetSplinePointType(i, ESplinePointType::Linear);
   }
 }
+
+void ACesiumCartographicPolygon::PostLoad() {
+  Super::PostLoad();
+
+  CesiumActors::validateActorFlags(this);
+}
diff --git a/Source/CesiumRuntime/Private/CesiumIonRasterOverlay.cpp b/Source/CesiumRuntime/Private/CesiumIonRasterOverlay.cpp
index 6657d9d0f..7eb927a5a 100644
--- a/Source/CesiumRuntime/Private/CesiumIonRasterOverlay.cpp
+++ b/Source/CesiumRuntime/Private/CesiumIonRasterOverlay.cpp
@@ -3,6 +3,7 @@
 #include "CesiumIonRasterOverlay.h"
 #include "Cesium3DTilesSelection/IonRasterOverlay.h"
 #include "Cesium3DTilesSelection/Tileset.h"
+#include "CesiumActors.h"
 #include "CesiumRuntime.h"
 #include "CesiumRuntimeSettings.h"
 
@@ -36,3 +37,9 @@ UCesiumIonRasterOverlay::CreateOverlay(
       TCHAR_TO_UTF8(*token),
       options);
 }
+
+void UCesiumIonRasterOverlay::PostLoad() {
+  Super::PostLoad();
+
+  CesiumActors::validateActorComponentFlags(this);
+}
diff --git a/Source/CesiumRuntime/Public/CesiumCartographicPolygon.h b/Source/CesiumRuntime/Public/CesiumCartographicPolygon.h
index 6a8d0acc8..76a89a0e1 100644
--- a/Source/CesiumRuntime/Public/CesiumCartographicPolygon.h
+++ b/Source/CesiumRuntime/Public/CesiumCartographicPolygon.h
@@ -51,6 +51,9 @@ class CESIUMRUNTIME_API ACesiumCartographicPolygon : public AActor {
   CesiumGeospatial::CartographicPolygon
   CreateCartographicPolygon(const FTransform& worldToTileset) const;
 
+  // AActor overrides
+  virtual void PostLoad() override;
+
 protected:
   virtual void BeginPlay() override;
 
diff --git a/Source/CesiumRuntime/Public/CesiumIonRasterOverlay.h b/Source/CesiumRuntime/Public/CesiumIonRasterOverlay.h
index 909b8641e..8773baf03 100644
--- a/Source/CesiumRuntime/Public/CesiumIonRasterOverlay.h
+++ b/Source/CesiumRuntime/Public/CesiumIonRasterOverlay.h
@@ -50,6 +50,9 @@ class CESIUMRUNTIME_API UCesiumIonRasterOverlay : public UCesiumRasterOverlay {
   UFUNCTION(CallInEditor, Category = "Cesium")
   void TroubleshootToken();
 
+  // UActorComponent overrides
+  virtual void PostLoad() override;
+
 protected:
   virtual std::unique_ptr<Cesium3DTilesSelection::RasterOverlay> CreateOverlay(
       const Cesium3DTilesSelection::RasterOverlayOptions& options = {})