使用swiper做垂直切换，每屏都增加了动画，在其中一屏插入水平切换，并且每屏也都是有动画，现在遇到这么个问题：
垂直切换动画无问题，当切换到水平swiper的时候，水平动画第一屏动画正常显示，横滑切换到第二个画面，动画消失，直接fade出现的。第三屏正常。然后向下切换后在回来，又出现该问题了。
html如下：

<div class="swiper-container swiper-container-h">
    <div class="swiper-wrapper">
        <section class="swiper-slide">1</section>
        <section class="swiper-slide">
            <div class="swiper-container swiper-container-v">
                <div class="swiper-wrapper">
                    <section class="swiper-slide"><div class="pro_tit font_hei ani" swiper-animate-effect="fadeInDown" swiper-animate-duration="0.3s" swiper-animate-delay="0.3s">动画A</div></section>
                    <section class="swiper-slide"><div class="pro_tit font_hei ani" swiper-animate-effect="fadeInDown" swiper-animate-duration="0.3s" swiper-animate-delay="0.3s">动画B</div></section>
                    <section class="swiper-slide"><div class="pro_tit font_hei ani" swiper-animate-effect="fadeInDown" swiper-animate-duration="0.3s" swiper-animate-delay="0.3s">动画C</div></section>
                </div>
            </div>
        </section>
        <section class="swiper-slide">3</section>
    </div>
</div>

js代码如下：

<script type="text/javascript">
var swiperH = new Swiper('.swiper-container-h',{
        on:{
                init: function(){
                        swiperAnimateCache(this);
                        swiperAnimate(this);
                }, 
                slideChangeTransitionEnd: function(){ 
                        swiperAnimate(this);
                }
        },
        direction:"vertical",
        navigation:{
                nextEl:'.nextPage',
        },
        effect : 'fade',
});
var swiperV = new Swiper('.swiper-container-v', {
        on:{
                init: function(){
                        swiperAnimateCache(this);
                        swiperAnimate(this);
                },
                
                slideChangeTransitionEnd: function(){ 
                        swiperAnimate(this);
                }
        },
        pagination: {
                el: '.swiper-pagination-v',
        },
        effect : 'fade',
});
</script>