Colang not working as expected

[mu-fazil-vk]

Hi, When I am using colang flow, it didn't passing user political message, if I remove it, then it works.
config.yml:

rails:
  input:
    flows:
      - detect political content

flows.co:

define flow detect political content
  user political message
  bot warn political

define user political message
  "politics"
  "vote"
  "government"

define bot warn political
  "Let's keep this conversation away from politics, please."

code:

async def moderate_input(messages):
    print(messages)
    response = await rails.generate_async(messages=messages, options={
        "rails": ["input"],  # Always use "input" here
        "log": {
            "activated_rails": True,
        }
    })

    print("🔍 Activated rails:")
    print(response)

response:

Ask something: hello
[{'role': 'user', 'content': 'hello'}]
🔍 Activated rails:
response=[{'role': 'assistant', 'content': ''}] llm_output=None output_data=None log=GenerationLog(activated_rails=[ActivatedRail(type='input', name='detect political content', decisions=['stop'], executed_actions=[], stop=True, additional_info=None, started_at=1751464434.368122, finished_at=1751464434.368811, duration=0.0006887912750244141)], stats=GenerationStats(input_rails_duration=0.0015857219696044922, dialog_rails_duration=None, generation_rails_duration=None, output_rails_duration=None, total_duration=0.004053831100463867, llm_calls_duration=0, llm_calls_count=0, llm_calls_total_prompt_tokens=0, llm_calls_total_completion_tokens=0, llm_calls_total_tokens=0), llm_calls=None, internal_events=None, colang_history=None) state=None

Ask something: