@task
def create_alert(input_param: str) -> str:
    print(f'created alert with param {input_param}')
    return input_param

@task
def always_true(alert: str):
    print('always_true called in ifelse')
    return True

@task
def enrich_alert(alert: str) -> str:
    print(f'enriching_alert {alert}')
    return f'{alert} enriched!'

@task
def post_alert(alert: str) -> None:
    print(f'posting {alert}!')


with Flow('Example flow') as flow:
    input_param = Parameter(name="input_param", required=True)
    alert = create_alert(input_param)
    enriched_alert = enrich_alert(alert)
    ifelse(always_true(alert), enriched_alert, None)
    post_alert(enriched_alert)
state = flow.run(parameters={'input_param': 'test-alert'})
flow.visualize(flow_state=state)

prefect/tasks/control_flow/conditional.py:89: PrefectWarning: One of the tasks passed to the switch condition has upstream dependencies: <Task: enrich_alert>. Those upstream tasks could run even if the switch condition fails, which might cause unexpected results.
  prefect.utilities.exceptions.PrefectWarning,