babel-plugin-add-module-exports bug repro

.babelrc-default

{
  "presets": [
    "@babel/env",
  ],
  "plugins": [
    "add-module-exports"
  ]
}

.babelrc-loose

{
  "presets": [
    ["@babel/env", {loose: true}]
  ],
  "plugins": [
    "add-module-exports"
  ]
}

index.js

export default class Test {
}

out-default.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var Test = function Test() {
  _classCallCheck(this, Test);
};

exports.default = Test;
module.exports = exports.default;

out-loose.js

"use strict";

exports.__esModule = true;
exports.default = void 0;

var Test = function Test() {};

exports.default = Test;

package.json

{
  "scripts": {
    "build": "babel index.js --config-file ./.babelrc-default -o out-default.js && babel index.js --config-file ./.babelrc-loose -o out-loose.js"
  },
  "dependencies": {
    "@babel/cli": "7.0.0-beta.53",
    "@babel/core": "7.0.0-beta.53",
    "@babel/preset-env": "7.0.0-beta.53",
    "babel-plugin-add-module-exports": "0.3.1"
  }
}