同样的代码，第一次创建就可以显示动画，然后当使用了Loader.clearRes之后再次创建就怎么都显示不了，是哪里用错了么？求指点
附件里上传了测试工程，打开后先按A键可以看到屏幕有两条鱼，然后再按空格将其彻底移除，然后再按A键就不显示了，以下是代码部分
环境：1.7.17_Beta
语言：as3

private var testAnim1:Animation;
		private var testAnim2:Animation;
		
		public function LayaSample() {
			//初始化引擎
			Laya.init(1136, 640,WebGL);
			
			trace("ok...");
			
			Laya.stage.on(Event.KEY_DOWN, this, this.onKeydown);
		}
		
		private function onKeydown(event:Event):void
		{
			var self:* = this;
			
			if(event.keyCode === Keyboard.SPACE)
			{
				//移除动画
				if(testAnim1)
				{
					testAnim1.clear();
					testAnim1.removeSelf();
					testAnim1 = null;
					
					testAnim2.clear();
					testAnim2.removeSelf();
					testAnim2 = null;
					
					
					Loader.clearRes("res/fish_1/stand.atlas", true);
					Loader.clearRes("res/fish_1/attack.atlas", true);

					trace("移除动画完成");
				}
				
				
			}
			else if(event.keyCode === Keyboard.A)
			{
				//加载动画
				Laya.loader.load(["res/fish_1/stand.atlas","res/fish_1/attack.atlas"], Handler.create(this, this.onAnimAtlasLoaded));
			}
		}
		
		private function onAnimAtlasLoaded():void
		{
			
			testAnim1 = new Animation();
			testAnim1.loadAnimation("res/fish_1/fish_1.ani");
			
			Laya.stage.addChild(testAnim1);
			testAnim1.play(0,true,"stand_" + 0);
			
			testAnim1.pos(500, 300);
			
			//------------------------------------------------------------------------------
			testAnim2 = new Animation();
			testAnim2.loadAnimation("res/fish_1/fish_1.ani");
			
			Laya.stage.addChild(testAnim2);
			testAnim2.play(0,true,"attack_" + 0);
			
			testAnim2.pos(400, 400);

			trace("创建动画完成");
			
		}

附件：
TestAnimationClear.rar

TestAnimationClear.rar