Step not working in variable product

Hi, I have updated the plugin but still doesn’t work.

I have added a filter to fix it. Maybe it can help:

add_filter( 'woocommerce_available_variation', 'cca_pass_variation_qty_rules', 50, 3 );
function cca_pass_variation_qty_rules( $data, $product, $variation ) {

    // Lee el meta serializado del plugin para esta variación
    $meta = get_post_meta( $variation->get_id(), 'quantity_var_args', true );

    if ( is_array( $meta ) ) {
        $min  = isset( $meta['min_item_var'] )  && $meta['min_item_var']  > 0 ? (int) $meta['min_item_var']  : 0;
        $max  = isset( $meta['max_item_var'] )  && $meta['max_item_var']        ? (int) $meta['max_item_var']  : 0; // puede ser NULL
        $step = isset( $meta['step_item_var'] ) && $meta['step_item_var'] > 0 ? (int) $meta['step_item_var'] : 0;

        // Claves que WooCommerce sí respeta (min/max/input_value)
        if ( $min > 0 ) {
            $data['min_qty']     = $min;
            $data['input_value'] = $min;
        }
        if ( $max > 0 ) {
            $data['max_qty'] = $max;
        }

        // Nuestras claves personalizadas para leer via JS
        $data['_cca_qty_min']  = $min > 0 ? $min : 1;
        $data['_cca_qty_max']  = $max > 0 ? $max : '';
        $data['_cca_qty_step'] = $step > 0 ? $step : 1;
    }

    return $data;
}

I also have added a script that changes quantity when you change variation to the minimum available for that variation. If you select a variation with minimum of 10 and change to another with minimum of 5, for example, it changes quantity to 5, so the customer knows this is the minimum, not 10.

add_action( 'wp_footer', 'cca_apply_variation_qty_rules_js', 100 );
function cca_apply_variation_qty_rules_js() {
    if ( ! is_product() ) return; ?>
    <script>
    jQuery(function($){
      var $form = $('form.variations_form');
      if(!$form.length) return;

      $form.on('found_variation', function(evt, variation){
        var min  = variation._cca_qty_min || variation.min_qty || 1;
        var max  = variation._cca_qty_max || variation.max_qty || '';
        var step = variation._cca_qty_step || 1;

        var $qty = $form.find('input.qty');

        if(min){ $qty.attr('min', min); }
        if(max){ $qty.attr('max', max); } else { $qty.removeAttr('max'); }
        if(step){ $qty.attr('step', step); }

        // 🔹 Siempre reiniciar la cantidad al mínimo (o 1 si no hay mínimo)
        $qty.val(min > 0 ? min : 1).trigger('change');
      });

      // Al limpiar selección de variaciones
      $form.on('reset_data', function(){
        var $qty = $form.find('input.qty');
        $qty.attr({min:1, step:1}).removeAttr('max').val(1);
      });
    });
    </script>
<?php }