jedcunningham commented on issue #17148:
URL: https://github.com/apache/airflow/issues/17148#issuecomment-885058106


   I was able to reproduce this. This happens on the tree view with the 
following DAG:
   
   ```
   from airflow import DAG
   from airflow.operators.dummy import DummyOperator
   from airflow.utils.dates import days_ago
   
   with DAG(dag_id="deep", schedule_interval=None, start_date=days_ago(100)) as 
dag:
       prev = None
       for i in range(0, 500):
           t = DummyOperator(task_id=f"t{i}")
           if prev:
               prev >> t
           prev = t
   ```


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