diff --git a/core/lib/Drupal/Core/Menu/LocalTaskManager.php b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
index afe88fe..ba014dd 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
@@ -343,7 +343,7 @@ public function getLocalTasks($level = 0) {
     if (!isset($this->taskData)) {
       $route_name = $this->routeMatch->getRouteName();
       // Look for route-based tabs.
-      $this->taskData[$route_name] = [
+      $this->taskData = [
         'tabs' => [],
         'route_name' => $route_name,
       ];
@@ -354,16 +354,16 @@ public function getLocalTasks($level = 0) {
         foreach ($local_tasks as $tab_level => $items) {
           $data[$tab_level] = empty($data[$tab_level]) ? $items : array_merge($data[$tab_level], $items);
         }
-        $this->taskData[$route_name]['tabs'] = $data;
+        $this->taskData['tabs'] = $data;
       }
       // Allow modules to alter local tasks.
-      $this->moduleHandler->alter('menu_local_tasks', $this->taskData[$route_name], $route_name);
+      $this->moduleHandler->alter('menu_local_tasks', $this->taskData, $route_name);
     }
 
-    if (isset($this->taskData[$route_name]['tabs'][$level])) {
+    if (isset($this->taskData['tabs'][$level])) {
       return [
-        'tabs' => $this->taskData[$route_name]['tabs'][$level],
-        'route_name' => $this->taskData[$route_name]['route_name'],
+        'tabs' => $this->taskData['tabs'][$level],
+        'route_name' => $this->taskData['route_name'],
       ];
     }