Issue #3282290: Update active results on combined facets.

Closes #3282290.

We need to update the active facet results on combined facets, in order to reflect the correct values in the summary.

src/Plugin/facets/processor/CombineFacetProcessor.php

@@ -145,6 +145,8 @@ class CombineFacetProcessor extends ProcessorPluginBase implements BuildProcesso
       return $results;
     }
 
+    // Load the active results on the facet.
+    $active_items = $facet->getActiveItems();
     $keyed_results = $facet->getResultsKeyedByRawValue($results);
 
     foreach ($enabled_combinations as $facet_id => $settings) {
@@ -164,10 +166,16 @@ class CombineFacetProcessor extends ProcessorPluginBase implements BuildProcesso
           $results = array_intersect_key($keyed_results, $current_facet->getResultsKeyedByRawValue());
           break;
       }
+
+      // Load the active results on the combined facet.
+      $active_items += $current_facet->getActiveItems();
+
       // Pass build processor information into current facet.
       $facet->addCacheableDependency($current_facet);
     }
 
+    // Update the facet active items so the summary is shown correctly.
+    $facet->setActiveItems($active_items);
     return $results;
   }