1.3.7 - "config_data" contents disappear after an API "update"

Using 1.3.7

a) Import a API config JSON via the dashboard w/ this

....
    "enable_context_vars": false,
    "config_data": {
        "foo": "bar"
    }
}

b) I export the API, the json contains the above as expected

c) Next I go to the “advanced options” tab, I change nothing but just click the “update” button

d) I re-export the JSON for the api def, now the “config_data” values are toast

....
    "enable_context_vars": false,
    "config_data": {}
}

You will probably need to hard reload or clear your cache.

Correct, ignore this.