Kratos doesn't accept boolean value upon error

ORY Kratos
#1

I defined the field “consent” in the file identity.traits.schema.json in order to record that the user has agreed to the terms of conditions of my app. I did it as so:

{
    ...
    "properties": {
        ...
        "traits": {
            ...
            "properties": {
                ...
                "consent": {
                    "type": "boolean"
                }
            },
            "required": [
                ...
                "consent"
            ],
        }
    }
}

The response I get from /self-service/browser/flows/requests/registration provided me this information about for the above field:

...
"traits.consent": {
    "name": "traits.consent",
    "type": "checkbox"
}

However, upon submitting when there is another error in the form (e.g., missing field), I get this response:

...
"traits.consent": {
    "name": "traits.consent",
    "type": "text",
    "value": "on",
    "messages": [
        {
            "id": 4000001,
            "text": "expected boolean, but got string",
            "type": "error"
        }
    ]}
}

For some reason, the type has changed to “text” and the value to “on”, but the error indicates that a boolean value is still expected.
Am I doing something wrong?