Issue #3378529 - Fix multiple parameters

Closes #3378529

src/PathProcessor/TrailingSlashOutboundPathProcessor.php

@@ -125,14 +125,18 @@ class TrailingSlashOutboundPathProcessor implements OutboundPathProcessorInterfa
     $active_bundles = TrailingSlashSettingsHelper::getActiveBundles();
     if (!empty($active_bundles)) {
       $url = Url::fromUri('internal:' . $path);
+
       try {
         if ($url->isRouted() && $params = $url->getRouteParameters()) {
-          $entity_type = key($params);
-          if (array_key_exists($entity_type, $active_bundles)) {
-            $entity = $this->entityTypeManager->getStorage($entity_type)->load($params[$entity_type]);
-            $bundle = $entity->bundle();
-            if (isset($active_bundles[$entity_type][$bundle])) {
-              return TRUE;
+          $entity_types = array_keys($params);
+
+          foreach ($entity_types as $entity_type) {
+            if (array_key_exists($entity_type, $active_bundles) &&
+              $entity = $this->entityTypeManager->getStorage($entity_type)->load($params[$entity_type])
+            ) {
+              if (isset($active_bundles[$entity_type][$entity->bundle()])) {
+                return TRUE;
+              }
             }
           }
         }
@@ -140,6 +144,7 @@ class TrailingSlashOutboundPathProcessor implements OutboundPathProcessorInterfa
       catch (\Exception $e) {
       }
     }
+
     return FALSE;
   }