Reset special Summon facets when necessary.

module/VuFind/src/VuFind/Search/Summon/Params.php

@@ -82,6 +82,18 @@ class Params extends \VuFind\Search\Base\Params
         return parent::addFacet($parts[0], $newAlias, $ored);
     }
 
+    /**
+     * Reset the current facet configuration.
+     *
+     * @return void
+     */
+    public function resetFacetConfig()
+    {
+        parent::resetFacetConfig();
+        $this->dateFacetSettings = [];
+        $this->fullFacetSettings = [];
+    }
+
     /**
      * Get the full facet settings stored by addFacet -- these may include extra
      * parameters needed by the search results class.