cocos creator的mask组件_graphics的BUG

Creator 2.x
#1

cocos creator引擎版本是2.2.0
mask组件的_graphics存在重大BUG，在原生平台（或是cocos 模拟器中运行）擦除的图案又会重新出现，在web平台不会；
附上DemoDemo.zip (1.3 MB)

#2

兄弟，逻辑上的问题哦，并不是graphics的bug
我把你的代码改了一下就OK了

const { ccclass, property } = cc._decorator;

@ccclass
export default class Helloworld extends cc.Component {

    @property(cc.Mask)
    mask: cc.Mask = null;

    @property(cc.Graphics)
    pen: cc.Graphics = null;

    @property
    cr: number = 0;

    private paths: cc.Vec2[][] = [];
    private _points: cc.Vec2[] = [];

    onLoad() {
      
        //注册触摸监听事件
        this.node.on(cc.Node.EventType.TOUCH_START, this.onTouchStart, this);
        this.node.on(cc.Node.EventType.TOUCH_MOVE, this.onTouchMove, this);
        this.node.on(cc.Node.EventType.TOUCH_END, this.onTouchEnd, this);
    }

    start() {

        console.log(this.mask);

        this.mask._graphics.lineWidth = 30;
        this.mask._graphics.strokeColor = cc.color(255, 0, 0, 150);
        this.mask._graphics.fillColor = cc.color(0, 255, 0, 255);    //cc.color(0, 255, 0);
        this.mask._graphics.lineJoin = cc.Graphics.LineJoin.ROUND;
        this.mask._graphics.lineCap = cc.Graphics.LineCap.ROUND;
    }

    //开始点击
    onTouchStart(event: cc.Event.EventTouch) {
        let point = event.touch.getLocation();
        point = this.node.convertToNodeSpaceAR(point);
        var points: cc.Vec2[] = [];
        this._points = points;
        this._points.push(point);
        this.paths.push(this._points);
    }

    //点击移动
    onTouchMove(event: cc.Event.EventTouch) {
        let point = event.touch.getLocation();
        point = this.node.convertToNodeSpaceAR(point);
        this._points.push(point);

        for (let i = 0; i < this.paths.length; i++) {
            const points = this.paths[i];
            this.mask._graphics.moveTo(points[0].x, points[0].y);
            for (let j = 1; j < points.length; j++) {
                const element = points[j];
                this.mask._graphics.lineTo(element.x, element.y);
            }
        }
        this.mask._graphics.stroke();
    }

    //点击结束
    onTouchEnd(event: cc.Event.EventTouch) {

    }

}
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#3

非常感谢，