diff --git a/packages/reflection/lib/src/core/scanner.dart b/packages/reflection/lib/src/core/scanner.dart
index 6fcd04a..57641cc 100644
--- a/packages/reflection/lib/src/core/scanner.dart
+++ b/packages/reflection/lib/src/core/scanner.dart
@@ -117,12 +117,14 @@ class Scanner {
 
       // Create and register factory function
       final factory = _createConstructorFactory(type, constructor);
-      Reflector.registerConstructorFactory(type, constructor.name, factory);
+      if (factory != null) {
+        Reflector.registerConstructorFactory(type, constructor.name, factory);
+      }
     }
   }
 
   /// Creates a constructor factory function for a given type and constructor.
-  static Function _createConstructorFactory(
+  static Function? _createConstructorFactory(
       Type type, ConstructorInfo constructor) {
     final wrapper = _FactoryWrapper(type, constructor.name);
     return (List<dynamic> args, [Map<Symbol, dynamic>? namedArgs]) {
diff --git a/packages/reflection/lib/src/mirrors/isolate_mirror_impl.dart b/packages/reflection/lib/src/mirrors/isolate_mirror_impl.dart
index 33370f8..78abb4a 100644
--- a/packages/reflection/lib/src/mirrors/isolate_mirror_impl.dart
+++ b/packages/reflection/lib/src/mirrors/isolate_mirror_impl.dart
@@ -61,20 +61,15 @@ class IsolateMirrorImpl implements IsolateMirror {
     if (identical(this, other)) return true;
     if (other is! IsolateMirrorImpl) return false;
 
-    return _debugName == other._debugName &&
-        _isCurrent == other._isCurrent &&
-        _rootLibrary == other._rootLibrary &&
-        _underlyingIsolate == other._underlyingIsolate;
+    // Only compare debug name and isCurrent flag
+    // Two mirrors pointing to the same isolate should be equal
+    return _debugName == other._debugName && _isCurrent == other._isCurrent;
   }
 
   @override
   int get hashCode {
-    return Object.hash(
-      _debugName,
-      _isCurrent,
-      _rootLibrary,
-      _underlyingIsolate,
-    );
+    // Hash code should be consistent with equals
+    return Object.hash(_debugName, _isCurrent);
   }
 
   @override