diff --git a/js/preserve-advanced-search.js b/js/preserve-advanced-search.js
index 41dc943..e703b36 100644
--- a/js/preserve-advanced-search.js
+++ b/js/preserve-advanced-search.js
@@ -1,12 +1,10 @@
-(function ($, Drupal, once) {
+(function (Drupal, drupalSettings) {
   'use strict';
 
   Drupal.behaviors.preserveAdvancedSearchParams = {
     attach: function (context, settings) {
 
-      console.log('preserve-advanced-search.js loaded');
-
-      // Extract a[] params from the current page URL
+      // Capture the a[] advanced search params from the current URL
       const rawSearch = window.location.search;
       const aParams = rawSearch
         .substring(1)
@@ -14,56 +12,46 @@
         .filter(part => part.startsWith('a%5B') || part.startsWith('a['))
         .join('&');
 
-      console.log('[AdvSearch] aParams found:', aParams);
-
-      // Nothing to preserve — bail out
       if (!aParams) return;
 
-      // Target the <ul> that has data-drupal-facet-id
-      // then find the .facet-slider inside it which is the noUiSlider element
-      once('preserve-advsearch-slider', '[data-drupal-facet-id]', context)
-        .forEach(function (el) {
-          const facetId = el.dataset.drupalFacetId;
-          const sliderEl = el.querySelector('.facet-slider');
-
-          console.log('[AdvSearch] Found facet:', facetId, 'slider el:', sliderEl);
-
-          if (!sliderEl || !sliderEl.noUiSlider) {
-            console.warn('[AdvSearch] No noUiSlider instance found on', sliderEl);
-            return;
-          }
-
-          // Get the facet settings from drupalSettings
-          const facetSettings = settings.facets && settings.facets[facetId];
-          console.log('[AdvSearch] facetSettings:', facetSettings);
-
-          if (!facetSettings) {
-            console.warn('[AdvSearch] No drupalSettings.facets entry for:', facetId);
-            return;
-          }
-
-          // Remove original change listener and replace with patched version
-          sliderEl.noUiSlider.off('change');
-          sliderEl.noUiSlider.on('change', function (values, handle, unencoded) {
-            let newUrl;
-
-            if (facetSettings.range) {
-              newUrl = facetSettings.url
-                .replace('__range_slider_min__', Math.round(unencoded[0]))
-                .replace('__range_slider_max__', Math.round(unencoded[1]));
-            } else {
-              newUrl = facetSettings.urls['f_' + values[0]];
-            }
-
-            console.log('[AdvSearch] Navigating to:', newUrl + '&' + aParams);
-
-            const separator = newUrl.includes('?') ? '&' : '?';
-            window.location.href = newUrl + separator + aParams;
+      const sliders = settings.facets && settings.facets.sliders;
+      if (!sliders) return;
+
+      // Replace any a[] params in a URL with the current page's a[] params.
+      // The current URL is always the source of truth — the server-built
+      // slider URL may contain stale or partial a[] params.
+      function rebuildUrl(url) {
+        if (!url) return url;
+        const parts = url.split('?');
+        const basePath = parts[0];
+        const query = parts[1] || '';
+
+        // Keep everything that is NOT an a[] param (i.e. the f[] facet params)
+        const keptParams = query
+          .split('&')
+          .filter(p => p.length > 0)
+          .filter(p => !p.startsWith('a%5B') && !p.startsWith('a['))
+          .join('&');
+
+        const finalQuery = [keptParams, aParams].filter(Boolean).join('&');
+        return basePath + '?' + finalQuery;
+      }
+
+      Object.keys(sliders).forEach(function (key) {
+        const sliderSettings = sliders[key];
+
+        if (sliderSettings.url) {
+          sliderSettings.url = rebuildUrl(sliderSettings.url);
+          console.log('[AdvSearch] Rebuilt slider URL for', key, ':', sliderSettings.url);
+        }
+
+        if (sliderSettings.urls) {
+          Object.keys(sliderSettings.urls).forEach(function (urlKey) {
+            sliderSettings.urls[urlKey] = rebuildUrl(sliderSettings.urls[urlKey]);
           });
-
-          console.log('[AdvSearch] Slider change handler patched successfully');
-        });
+        }
+      });
     }
   };
 
-})(jQuery, Drupal, once);
+})(Drupal, drupalSettings);