diff --git a/CHANGELOG.md b/CHANGELOG.md
index 534d227ae6..2d738cf9ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,7 @@
 
 - [usd#1808](https://github.com/Autodesk/arnold-usd/issues/1808) - Fix the error "Cannot load _htoa_pygeo library required for volume rendering in Solaris" in Houdini 19.5+.
 - [usd#1812](https://github.com/Autodesk/arnold-usd/issues/1812) - Improve Material network creation by caching the node entries and the osl code.
+- [usd#1781](https://github.com/Autodesk/arnold-usd/issues/1781) - Fix a crash happening in a aiStandin usd when scrolling the timeline in maya.
 
 ## [7.2.5.1] - 2024-01-18
 
diff --git a/libs/translator/reader/reader.cpp b/libs/translator/reader/reader.cpp
index 3d6ccf80c6..3bc0b1932c 100644
--- a/libs/translator/reader/reader.cpp
+++ b/libs/translator/reader/reader.cpp
@@ -83,22 +83,27 @@ namespace {
         WorkDispatcher *dispatcher;
     };
 };
-// global reader registry, will be used in the default case
-static UsdArnoldReaderRegistry *s_readerRegistry = nullptr;
-static int s_mustDeleteRegistry = 0;
+
 
 static AtMutex s_globalReaderMutex;
 static std::unordered_map<int, int> s_cacheRefCount;
-
+UsdArnoldReader::UsdArnoldReader()
+        : _procParent(nullptr),
+          _universe(nullptr),
+          _convert(true),
+          _debug(false),
+          _threadCount(1),
+          _mask(AI_NODE_ALL),
+          _defaultShader(nullptr),
+          _hasRootPrim(false),
+          _readStep(READ_NOT_STARTED),
+          _purpose(UsdGeomTokens->render),
+          _dispatcher(nullptr),
+          _readerRegistry(new UsdArnoldReaderRegistry())
+    {}
 UsdArnoldReader::~UsdArnoldReader()
 {
-    if (s_mustDeleteRegistry && _registry) {
-        delete _registry;
-        s_mustDeleteRegistry = false;
-        _registry = s_readerRegistry;
-    }
-    // What do we want to do at destruction here ?
-    // Should we delete the created nodes in case there was no procParent ?
+    delete _readerRegistry;
 }
 
 void UsdArnoldReader::TraverseStage(UsdPrim *rootPrim, UsdArnoldReaderContext &context, 
@@ -291,19 +296,7 @@ void UsdArnoldReader::ReadStage(UsdStageRefPtr stage, const std::string &path)
     // and the eventual procedural mask set above
     _mask = _mask & procMask;
 
-    // eventually use a dedicated registry
-    if (_registry == nullptr) {
-        // No registry was set (default), let's use the global one
-        {
-            std::lock_guard<AtMutex> guard(s_globalReaderMutex);
-            if (s_readerRegistry == nullptr) {
-                s_readerRegistry = new UsdArnoldReaderRegistry(); // initialize the global registry
-                s_readerRegistry->RegisterPrimitiveReaders();
-            }
-        }
-        _registry = s_readerRegistry;
-    } else
-        _registry->RegisterPrimitiveReaders();
+    _readerRegistry->RegisterPrimitiveReaders();
 
     UsdPrim *rootPrimPtr = nullptr;
 
@@ -609,7 +602,7 @@ void UsdArnoldReader::ReadPrimitive(const UsdPrim &prim, UsdArnoldReaderContext
         _renderSettings = objName;
     }
 
-    UsdArnoldPrimReader *primReader = _registry->GetPrimReader(objType);
+    UsdArnoldPrimReader *primReader = _readerRegistry->GetPrimReader(objType);
     if (primReader && (_mask & primReader->GetType())) {
         if (_debug) {
             std::string txt;
@@ -706,8 +699,8 @@ void UsdArnoldReader::SetProceduralParent(AtNode *node)
 }
 
 void UsdArnoldReader::CreateViewportRegistry(AtProcViewportMode mode, const AtParamValueMap* params) {
-    s_mustDeleteRegistry = true;
-     _registry = new UsdArnoldViewportReaderRegistry(mode, params);
+    delete _readerRegistry;
+    _readerRegistry = new UsdArnoldViewportReaderRegistry(mode, params);
 }
 
 void UsdArnoldReader::SetUniverse(AtUniverse *universe)
diff --git a/libs/translator/reader/reader.h b/libs/translator/reader/reader.h
index cefd3bd84e..ce9971b91f 100644
--- a/libs/translator/reader/reader.h
+++ b/libs/translator/reader/reader.h
@@ -47,21 +47,7 @@ class UsdArnoldReaderRegistry;
 
 class UsdArnoldReader : public ProceduralReader {
 public:
-    UsdArnoldReader()
-        : _procParent(nullptr),
-          _universe(nullptr),
-          _registry(nullptr),
-          _convert(true),
-          _debug(false),
-          _threadCount(1),
-          _mask(AI_NODE_ALL),
-          _defaultShader(nullptr),
-          _hasRootPrim(false),
-          _readStep(READ_NOT_STARTED),
-          _purpose(UsdGeomTokens->render),
-          _dispatcher(nullptr)
-    {
-    }
+    UsdArnoldReader();
     ~UsdArnoldReader();
 
     void ReadStage(UsdStageRefPtr stage,
@@ -74,7 +60,7 @@ class UsdArnoldReader : public ProceduralReader {
 
     void SetProceduralParent(AtNode *node) override;
     void SetUniverse(AtUniverse *universe) override;
-   // void SetRegistry(UsdArnoldReaderRegistry *registry);
+
     void CreateViewportRegistry(AtProcViewportMode mode, const AtParamValueMap* params) override;
     void SetFrame(float frame) override;
     void SetMotionBlur(bool motionBlur, float motionStart = 0.f, float motionEnd = 0.f) override;
@@ -89,7 +75,7 @@ class UsdArnoldReader : public ProceduralReader {
     const UsdStageRefPtr &GetStage() const { return _stage; }
     const std::vector<AtNode *> &GetNodes() const override { return _nodes; }
     float GetFrame() const { return _time.frame; }
-    UsdArnoldReaderRegistry *GetRegistry() { return _registry; }
+    UsdArnoldReaderRegistry *GetRegistry() { return _readerRegistry; }
     AtUniverse *GetUniverse() { return _universe; }
     const AtNode *GetProceduralParent() const { return _procParent; }
     bool GetDebug() const { return _debug; }
@@ -206,8 +192,6 @@ class UsdArnoldReader : public ProceduralReader {
 private:
     const AtNode *_procParent;          // the created nodes are children of a procedural parent
     AtUniverse *_universe;              // only set if a specific universe is being used
-    UsdArnoldReaderRegistry *_registry; // custom registry used for this reader. If null, a global
-                                        // registry will be used.
     TimeSettings _time;
     bool _convert; // do we want to convert the primitives attributes
     bool _debug;
@@ -235,6 +219,8 @@ class UsdArnoldReader : public ProceduralReader {
     AtString _pxrMtlxPath; // environment variable PXR_MTLX_STDLIB_SEARCH_PATHS
 
     unsigned int _id = 0; ///< Arnold shape ID for the procedural.
+    // Reader registry, will be used in the default case
+    UsdArnoldReaderRegistry *_readerRegistry = nullptr;
 };
 
 class UsdArnoldReaderThreadContext : public ArnoldAPIAdapter {