diff --git a/src/examples/app/graphics/IscsFanInteraction.ts b/src/examples/app/graphics/IscsFanInteraction.ts
index 8ec9916..255af32 100644
--- a/src/examples/app/graphics/IscsFanInteraction.ts
+++ b/src/examples/app/graphics/IscsFanInteraction.ts
@@ -47,6 +47,7 @@ export class IscsFanState extends GraphicStateBase implements IIscsFanState {
     let states;
     if (proto) {
       states = proto;
+      states.common.graphicType = IscsFan.Type;
     } else {
       states = new graphicStates.IscsFan({
         common: GraphicStateBase.defaultCommonState(IscsFan.Type),
diff --git a/src/jlgraphic/utils/GraphicUtils.ts b/src/jlgraphic/utils/GraphicUtils.ts
index a710fde..1fbc572 100644
--- a/src/jlgraphic/utils/GraphicUtils.ts
+++ b/src/jlgraphic/utils/GraphicUtils.ts
@@ -67,15 +67,16 @@ export function recursiveFindChild(
   container: Container,
   finder: (child: DisplayObject) => boolean
 ): DisplayObject | null {
+  let result = null;
   for (let i = 0; i < container.children.length; i++) {
     const child = container.children[i];
     if (finder(child)) {
       return child;
     } else if (child.children) {
-      return recursiveFindChild(child as Container, finder);
+      result = recursiveFindChild(child as Container, finder);
     }
   }
-  return null;
+  return result;
 }
 
 export interface BezierParam {