龙骨动画资源释放后再次加载对应的龙骨，导致图片混乱了

Creator 2.x
#1

问题描述：加载远程资源构建一个龙骨，10秒后释放资源，删除node，在过10秒后 重新加载远程资源构建龙骨，发现图片错乱了

问题还原：新建一个场景，添加下面的js代码，运行就可以看到

问题版本：cocos creator v2.3.1

onLoad () {
        const that = this;
        let npc = null;

        // 构建龙骨的函数
        const buildNPC = function () {
            cc.loader.load({url: 'https://aharesource-bucket.ahaschool.com.cn/game/2020/06/05/5ed9b02f9a78eDWKCUEGs0c.png', type: 'png'}, function (err, pic1) {
                cc.loader.load({url: 'https://aharesource-bucket.ahaschool.com.cn/game/2020/06/19/5eec694b3134eWpdeQqNVRx.json', type: 'txt'}, function (err, tex1) {
                    cc.loader.load({url: 'https://aharesource-bucket.ahaschool.com.cn/game/2020/06/05/5ed9b03861f6dtSC4AQMYuY.json', type: 'txt'}, function (err, ske1) {
                        npc = new cc.Node;
                        const armatureDisplay = npc.addComponent(dragonBones.ArmatureDisplay);
                        const tex = new dragonBones.DragonBonesAtlasAsset;
                        const ske = new dragonBones.DragonBonesAsset;
                        tex.texture = pic1;
                        tex.atlasJson = tex1;
                        ske.dragonBonesJson = ske1;
                        armatureDisplay.dragonAsset = ske;
                        armatureDisplay.dragonAtlasAsset = tex;
                        armatureDisplay.armatureName = 'Armature';
                        npc.scale = 0.3;
                        npc.position = cc.v2(300, 0);
                        npc.parent = that.node;
                    });
                });
            });
        }
        // 先构建一个龙骨
        buildNPC();

        // 10秒之后 移除龙骨
        this.scheduleOnce(function () {
            npc.destroy();
            cc.loader.release('https://aharesource-bucket.ahaschool.com.cn/game/2020/06/05/5ed9b02f9a78eDWKCUEGs0c.png');
            cc.loader.release('https://aharesource-bucket.ahaschool.com.cn/game/2020/06/19/5eec694b3134eWpdeQqNVRx.json');
            cc.loader.release('https://aharesource-bucket.ahaschool.com.cn/game/2020/06/05/5ed9b03861f6dtSC4AQMYuY.json');
        }, 10);

        // 再过10秒之后 重新构建一个龙骨
        this.scheduleOnce(function () {
            buildNPC();
        }, 20);
    },
#2 
        // 10秒之后 移除龙骨
        this.scheduleOnce(function () {
            
            if(npc) {
                let disp = npc.getComponent(dragonBones.ArmatureDisplay);
                disp.dragonAtlasAsset.destroy();
                disp.dragonAsset.destroy();
                npc.destroy();
            }

            cc.loader.release('https://aharesource-bucket.ahaschool.com.cn/game/2020/06/05/5ed9b02f9a78eDWKCUEGs0c.png');
            cc.loader.release('https://aharesource-bucket.ahaschool.com.cn/game/2020/06/19/5eec694b3134eWpdeQqNVRx.json');
            cc.loader.release('https://aharesource-bucket.ahaschool.com.cn/game/2020/06/05/5ed9b03861f6dtSC4AQMYuY.json');
        }, 10);

@1306003944 需要清理相关的资源