Flickering with swiper in android

I’m having flickering issue with a swiper in popup
the issue is not present if the swiper is not in a popup

here is the swiper code

<div class="section-container">
                            <div id="mobile-container" class="mobile-container image-1">
                                <div class="slider-element-container">
                                    <div class="swiper-container11" dir="rtl">
                                        <div class="swiper-wrapper">
                                            <div class="swiper-slide">
                                               <div class="content">
                                                    <span class="headline">اعلان مجاني</span>
                                                    <span class="tag">24 ساعة</span>
                                                    <ul>
                                                        <li>يعرض في نطاق مدينتك</li>
                                                        <li>التواصل عن طريق التطبيق</li>
                                                        <li>يمكن ادراج مادة اعلانية واحدة (فيديو او صورة)</li>
                                                    </ul>
                                                    <button class="button" aria-label="Read more">اضف اعلانك</button>
                                                </div>
                                            </div>
                                            <div class="swiper-slide">
                                                <div class="content">
                                                    <span class="headline">اعلان محلي</span>
                                                    <span class="tag">اسبوع واحد</span>
                                                    <ul>
                                                        <li>يعرض في نطاق مدينتك.</li>
                                                        <li>التواصل داخل او خارج التطبيق.</li>
                                                        <li>يمكن ادراج مجموعة مواد اعلانية (فيديو او صورة).</li>
                                                        <li>يمكنك تغيير محتوى الإعلان في اي وقت.</li>
                                                    </ul>
                                                    <button class="button" aria-label="Read more">150 ريال</button>
                                                </div>
                                            </div>
                                            <div class="swiper-slide">
                                                <div class="content">
                                                    <span class="headline">اعلان متجر</span>
                                                    <span class="tag">اسبوع واحد</span>
                                                    <ul>
                                                        <li>يعرض في كل المدن والمناطق</li>
                                                        <li>التواصل داخل او خارج التطبيق.</li>
                                                        <li>يمكن ادراج مجموعة مواد اعلانية (فيديو او صورة).</li>
                                                        <li>يمكنك تغيير محتوى الإعلان في اي وقت.</li>
                                                        <li>ربط متجرك الإلكتروني بالإعلان</li>
                                                    </ul>
                                                    <button class="button" aria-label="Read more">500 ريال</button>
                                                </div>
                                            </div>
                                        </div>
                                        <div class="swiper-pagination11"></div>
                                    </div>
                                </div>
                            </div>
                        </div>

here is the css

.mobile-container.image-3{ background-image: url('../assets/bg/1.jpg'); }
    .mobile-container.image-2{ background-image: url('../assets/bg/2.jpg'); }
    .mobile-container.image-1{ background-image: url('../assets/bg/3.jpg'); }

div.section-container {
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}

.mobile-container {
  width: 100%;
  height: 100%;
  position: relative;
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  -webkit-box-shadow: 0px 20px 30px -30px #202637;
          box-shadow: 0px 20px 30px -30px #202637;
  -webkit-transition: all 0.25s ease;
  transition: all 0.25s ease;
}

.mobile-container::before,
.mobile-container::after {
  content: '';
  display: block;
  height: 140px;
  width: 100%;
  position: absolute;
  left: 0;
  z-index: 1;
}

.mobile-container::before {
  top: 0;
  background: -webkit-gradient(linear, left top, left bottom, from(#000), to(rgba(0, 0, 0, 0)));

  background: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0) 100%);

  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#000, endColorstr=rgba(0, 0, 0, 0), GradientType=0);
}

.mobile-container::after {
  bottom: 0;
  background: -webkit-gradient(linear, left top, left bottom, from(rgba(0, 0, 0, 0)), to(#000));

  background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, #000 100%);

 filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=rgba(0, 0, 0, 0), endColorstr=#000, GradientType=0);
}

.swiper-pagination11 {
    position: absolute;
    text-align: center;
    -webkit-transition: .3s opacity;
    transition: .3s opacity;
    -webkit-transform: translate3d(0,0,0);
            transform: translate3d(0,0,0);
    z-index: 10;
}

.slider-element-container {
  position: relative;
  z-index: 2;
  height: calc(100% - 27px);
  padding-bottom: 25px;
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: end;
      -ms-flex-align: end;
          align-items: flex-end;
  -webkit-box-pack: end;
      -ms-flex-pack: end;
          justify-content: flex-end;
}

.slider-element-container .swiper-container11 {
  width: 100%;
  padding: 0 20px 40px;
  height: 90%;
}

.slider-element-container .swiper-pagination-bullet {
  background-color: rgba(255, 255, 255, 0.9);
}

.slider-element-container .swiper-pagination-bullet.swiper-pagination-bullet-active {
  background-color: #F02B67;
}

.slider-element-container .swiper-slide {
  width: 100%;
  padding: 30px;
  background-color: #FFF;
  border-radius: 8px;
  -webkit-transition: all 0.35s ease;
  transition: all 0.35s ease;
  opacity: 0.3;
  height: 100%;
  -webkit-transform: scale(0.85)!important;
          transform: scale(0.85)!important;
}

.slider-element-container .swiper-slide .content {
  -webkit-transition: all 0.35s ease;
  transition: all 0.35s ease;
  opacity: 0;
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: start;
      -ms-flex-align: start;
          align-items: flex-start;
}

.slider-element-container .swiper-slide .content .headline {
  font-size: 22px;
  line-height: 26px;
  font-weight: 700;
  color: #202637;
  margin-bottom: 15px;
}

.slider-element-container .swiper-slide .content .tag {
  padding: 4px 5px;
  background-color: #202637;
  color: #FFF;
  font-size: 10px;
  line-height: 10px;
  font-weight: 700;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 40px;
  border-radius: 4px;
}

.slider-element-container .swiper-slide .content button.button {
  cursor: pointer;
  width: 100%;
  margin-top: auto;
  text-align: center;
  text-transform: uppercase;
  font-weight: 600;
  color: #FFF;
  background-color: #F02B67;
  border-radius: 6px;
  border: 0 none;
  -webkit-appearance: none;
  -webkit-box-shadow: 0 10px 10px -10px rgba(240, 43, 103, 0.6);
          box-shadow: 0 10px 10px -10px rgba(240, 43, 103, 0.6);
  -webkit-transition: all 0.25s ease;
  transition: all 0.25s ease;
}

.slider-element-container .swiper-slide .content button.button:hover {
  -webkit-transform: translate(0, -2px);
          transform: translate(0, -2px);
  -webkit-box-shadow: 0 10px 10px -10px #F02B67;
          box-shadow: 0 10px 10px -10px #F02B67;
}

.slider-element-container .swiper-slide .content button.button:focus {
  outline: 1px dashed #202637;
}

.slider-element-container .swiper-slide.swiper-slide-active {
  opacity: 1;
  -webkit-transform: scale(1)!important;
          transform: scale(1)!important;
}

.slider-element-container .swiper-slide.swiper-slide-active .content {
  opacity: 1;
}

.infobox-container {
  display: none;
}

@media screen and (min-width: 1024px) {
  .infobox-container {
    display: block;
    position: absolute;
    right: 50px;
    bottom: 50px;
    z-index: 99;
  }

  .infobox-container .infobox-toggle {
    width: 50px;
    height: 50px;
    border-radius: 100px;
    background: #E48873;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
  }

  .infobox-container .social-media-links {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: horizontal;
    -webkit-box-direction: normal;
        -ms-flex-direction: row;
            flex-direction: row;
    position: absolute;
    right: 80px;
    bottom: 15px;
  }

  .infobox-container .social-media-links a {
    margin: 0 15px;
    -webkit-transition: all 0.25s ease;
    transition: all 0.25s ease;
  }

  .infobox-container .social-media-links a:hover {
    -webkit-transform: translate(0, -2px);
            transform: translate(0, -2px);
  }

  .infobox-container .social-media-links a:hover svg path {
    fill: #E48873;
  }

  .infobox-container .infobox-detail-container {
    display: none;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    position: absolute;
    bottom: 80px;
    min-width: 240px;
    right: 0;
    background: #FFF;
    border-radius: 12px;
    padding: 20px;
  }

  .infobox-container .infobox-detail-container.active {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
  }

  .infobox-container .infobox-detail-container h4 {
    margin-bottom: 15px;
    font-size: 22px;
    line-height: 24px;
    font-weight: 600;
    color: #000;
  }

  .infobox-container .infobox-detail-container p {
    margin-bottom: 15px;
    font-weight: 400;
    font-size: 16px;
    line-height: 20px;
    color: #000;
  }

  .infobox-container .infobox-detail-container ul {
    list-style: none;
    padding: 0;
  }

  .infobox-container .infobox-detail-container ul li {
    display: block;
    list-style: none;
    padding: 0;
    margin-bottom: 6px;
  }

  .infobox-container .infobox-detail-container ul li:last-child {
    margin: 0;
  }

  .infobox-container .infobox-detail-container ul li a {
    display: block;
    width: 100%;
    padding: 5px 8px;
    font-weight: 600;
    font-size: 18px;
    line-height: 20px;
    background-color: #F4F4F4;
    border-radius: 4px;
    color: #000;
    text-decoration: none;
    -webkit-transition: all 0.25s ease;
    transition: all 0.25s ease;
  }

  .infobox-container .infobox-detail-container ul li a:hover {
    background-color: #E48873;
    color: #FFF;
  }

}

here is the JS code for the swiper

   adsSwiper = new Swiper('.swiper-container11', {
        direction: 'horizontal',
        loop: false,
        grabCursor: true,
        slidesPerView: 1.35,
        centeredSlides: true,
        spaceBetween: 20,
        roundLengths: true,
        pagination: {
          el: '.swiper-pagination11'
        }
      });
  adsSwiper.on('slideChangeTransitionStart', function () {
    $('.swiper-slide').removeClass('elevation-10');
    $('.swiper-slide-active').addClass('elevation-10');
    if (adsSwiper.activeIndex === 1) {
      var mobileContainer = $('#mobile-container');
      mobileContainer.removeClass();
      mobileContainer.addClass('mobile-container');
      mobileContainer.addClass('image-2');
    } else if (adsSwiper.activeIndex === 2) {
      var mobileContainer = $('#mobile-container');
      mobileContainer.removeClass();
      mobileContainer.addClass('mobile-container');
      mobileContainer.addClass('image-3');
    } else if (adsSwiper.activeIndex === 0) {
      var mobileContainer = $('#mobile-container');
      $('#mobile-container').removeClass();
      $('#mobile-container').addClass('mobile-container');
      $('#mobile-container').addClass('image-1');
    }
  });

That is more like a browser rendering issue, you can try to use this hack/fix Flickering in Safari · Issue #3527 · nolimits4web/swiper · GitHub

i just moved the swiper from the popup