来自图像的动画第一次闪烁，但在窗口商店应用程序中第二次完美运行

Question

我使用表达式混合创建了一个来自png图像的故事登机动画。当我第一次播放动画时它会闪烁但是当我第二次播放时它没有闪烁？为什么？ 有没有什么方法可以让动画第一次不闪烁？

这是我的代码

<Storyboard x:Name="Storyboard1">
            <ObjectAnimationUsingKeyFrames Duration="0:0:5.0"
                                                   Storyboard.TargetName="image" 
                                                   Storyboard.TargetProperty="Source">
                <ObjectAnimationUsingKeyFrames.KeyFrames>
                    <DiscreteObjectKeyFrame KeyTime="0:0:0.01">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a01.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>


                    <DiscreteObjectKeyFrame KeyTime="0:0:0.2">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a02.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                    <DiscreteObjectKeyFrame KeyTime="0:0:0.6">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a03.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                    <DiscreteObjectKeyFrame KeyTime="0:0:1.0">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a04.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                    <DiscreteObjectKeyFrame KeyTime="0:0:1.4">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a05.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                    <DiscreteObjectKeyFrame KeyTime="0:0:1.8">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a06.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                    <DiscreteObjectKeyFrame KeyTime="0:0:2.2">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a07.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                    <DiscreteObjectKeyFrame KeyTime="0:0:2.6">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a08.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                    <DiscreteObjectKeyFrame KeyTime="0:0:3.0">
                        <DiscreteObjectKeyFrame.Value>
                            <BitmapImage UriSource="animation/entering toilet/a09.png"/>
                        </DiscreteObjectKeyFrame.Value>
                    </DiscreteObjectKeyFrame>
                </ObjectAnimationUsingKeyFrames.KeyFrames>
            </ObjectAnimationUsingKeyFrames>
        </Storyboard>