Salve raga, intanto posto il codice in PHP e CSS

Codice PHP:
 <div class="slider-container">            <div class="slider">                    <div class="slides" id="slidesgen">                        <?php $cont=1; $prev=0; $next=0;                            foreach ( $post->fotos as $k => $v ) {                                $idimg = get_the_ID() + $cont;                                             $img = wp_get_attachment_image_src( (string) $v, get_option( 'option_wpmrc_front_imgelenco' ) );                                $img = @reset( $img );?>                                                                <div id="slides<?php echo $idimg; ?>" class="slide">                                    <div class="slide__text" id="slides_<?php echo $idimg; ?>">                                        <img id="slides__<?php echo $idimg; ?>" style="border-radius:15px;" src="<?php echo $img; ?>">                                       </div>                                      <?php                                    $prev = $idimg - 1;                                    $next = $idimg + 1;?>                                                                        <a class="slide__prev" href="#slides<?php echo $prev; ?>" title="Prev"></a>                                    <a class="slide__next" href="#slides<?php echo $next; ?>" title="Next"></a>
                                </div>
                                <?php $cont++;                                                       }?>                    </div>            </div>        </div>
codice:
/* slider*/
/* Slideshow container */

html,
body {
  height: 100%;
  margin: 0px;
}

.slider-container {
  /*background: linear-gradient(
    149deg,
    rgb(247, 0, 255) 0%,
    rgb(255, 145, 0) 100%
  );*/
  display: flex;
  align-items: center;
  justify-content: center;
  height: 270px;
  margin-top:-40px;
}

.slider {
  width: 500px;
  max-width: 600px;
  height: 300px;
  margin: 20px;
  text-align: center;
  border-radius: 20px;
  overflow: hidden;
  position: relative;
}

.slides {
  display: flex;
  overflow-x: scroll;
  position: relative;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
}

.slide:nth-of-type(even) {
  background-color: rgb(250, 246, 212);
}

.slide {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  width: 100%;
  height: 300px;
  scroll-snap-align: center;
  margin-right: 0px;
  box-sizing: border-box;
  background: white;
  transform-origin: center center;
  transform: scale(1);
}

.slide__text {
  font-size: 40px;
  font-weight: bold;
  font-family: sans-serif;
}

.slide a {
  background: none;
  border: none;
}

a.slide__prev,
.slider::before {
  transform: rotate(135deg);
  -webkit-transform: rotate(135deg);
  left: 5%;

}

a.slide__next,
.slider::after {
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
  right: 5%;
}

.slider::before,
.slider::after,
.slide__prev,
.slide__next {
  position: absolute;
  top: 48%;
  width: 35px;
  height: 35px;
  border: solid black;
  border-width: 0 4px 4px 0;
  padding: 3px;
  box-sizing: border-box;
}

.slider::before,
.slider::after {
  content: "";
  z-index: 1;
  background: none;
  pointer-events: none;
}

.slider__nav {
  box-sizing: border-box;
  position: absolute;
  bottom: 5%;
  left: 50%;
  width: 200px;
  margin-left: -100px;
  text-align: center;
}

.slider__navlink {
  display: inline-block;
  height: 15px;
  width: 15px;
  border-radius: 50%;
  background-color: black;
  margin: 0 10px 0 10px;
}


.read-article{
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 999;
  color: #000;
  background: white;
  padding: 10px 20px;
  border-radius: 10px;
  font-family: arial;
  text-decoration: none;
  box-shadow: rgb(50 50 93 / 25%) 0 0 100px -20px, rgb(0 0 0 / 30%) 0 0 60px -15px;
}
.read-article:hover{
    background: #d5d5d5;
    box-shadow: rgba(34, 34, 53, 0.25) 0 0 100px -20px, rgb(0 0 0 / 30%) 0 0 60px 0px;
}
iframe[sandbox] .read-article{
  display: none;
}

.fa-paw, .fa-car{
  color: #163264;
}


@media only screen and (max-width: 768px) {
  .slider-container{
    height:370px;
  }  

  .slider{
    height:330px;
  }

  a.slide__next, .slider::after,a.slide__prev, .slider::before {
    display: none;
  }
   
}
Il link è questo: https://casaviva.house/offerte-affit...-appartamenti/

Praticamente il problema sono le frecce dello slider. Usando Ispeziona Elemento di Chrome e guardando il codice mi sembra ok ma cliccando ad esempio sulla freccia next non punta allo slide successivo