core/lib/Drupal/Core/Menu/LocalTaskManager.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/lib/Drupal/Core/Menu/LocalTaskManager.php b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
index afe88fe..859fae3 100644
--- a/core/lib/Drupal/Core/Menu/LocalTaskManager.php
+++ b/core/lib/Drupal/Core/Menu/LocalTaskManager.php
@@ -340,8 +340,8 @@ public function getTasksBuild($current_route_name) {
    * {@inheritdoc}
    */
   public function getLocalTasks($level = 0) {
-    if (!isset($this->taskData)) {
-      $route_name = $this->routeMatch->getRouteName();
+    $route_name = $this->routeMatch->getRouteName();
+    if (!isset($this->taskData[$route_name])) {
       // Look for route-based tabs.
       $this->taskData[$route_name] = [
         'tabs' => [],