diff --git a/app/assets/javascripts/app/lib/app_post/task_manager.coffee b/app/assets/javascripts/app/lib/app_post/task_manager.coffee
index 027fcbc8e..1edea371e 100644
--- a/app/assets/javascripts/app/lib/app_post/task_manager.coffee
+++ b/app/assets/javascripts/app/lib/app_post/task_manager.coffee
@@ -335,6 +335,7 @@ class _taskManagerSingleton extends App.Controller
     task = @get(key)
     if !task
       throw "No such task with '#{key}' to notify"
+    return if task.notify
     task.notify = true
     @taskUpdate(task)