turbaszek commented on issue #12309:
URL: https://github.com/apache/airflow/issues/12309#issuecomment-726179518
Minimal example to replicate it:
```py
from airflow.models import DAG
from airflow.operators.python import task
from airflow.utils.dates import days_ago
from airflow.utils.state import State
from airflow.utils.task_group import TaskGroup
@task
def show():
print("cats are awesome")
with DAG(
"using_task_group",
default_args={'owner': 'airflow'},
start_date=days_ago(2),
schedule_interval=None,
) as dag:
with TaskGroup(group_id="tasks_1") as tg1:
show()
show()
if __name__ == '__main__':
dag.clear(dag_run_state=State.NONE)
dag.run()
```
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