Discrepancy between Logic jump in GUI and Typeform API request

Hi,

       I’ve created simple form submission with consist of Logic jump when user has type something in the form if

• correct → then go to next page
• incorrect → go back to input again

When I check the preview, everything seems working just fine. All logics work correct as expect. But when I use api request to https://api.typeform.com/forms/{formId} it seems not what I expect. The logic field is incorrect. Please see details below

here is logic portion, 

{
  "logic": [
        {
            "type": "field",
            "ref": "captcha",
            "actions": [
                {
                    "action": "jump",
                    "details": {
                        "to": {
                            "type": "field",
                            "value": "captcha_incorrect_loop"
                        }
                    },
                    "condition": {
                        "op": "always",
                        "vars": []
                    }
                }
            ]
        },
        {
            "type": "field",
            "ref": "captcha_incorrect_loop",
            "actions": [
                {
                    "action": "jump",
                    "details": {
                        "to": {
                            "type": "field",
                            "value": "captcha"
                        }
                    },
                    "condition": {
                        "op": "always",
                        "vars": []
                    }
                }
            ]
        }
    ]
}

here is the GUI

Logic jump setup

What do I missed? Please clarify

Thank in advanced

Teerapat