为什么我的Vue项目中的promise.finally在Edge中不起作用？

让我的polyfill在Edge中工作时遇到了很大的麻烦。我尝试了各种失败的尝试来遵循文档。这似乎是有希望的。最后特别是那是行不通的。这是在vuex模块中发生的，因此我尝试将vuex添加到vue.config中的transpileDependencies，但是没有运气。

我的babel.config.js：

module.exports = {
  presets: [['@vue/cli-plugin-babel/preset', {
    useBuiltIns: 'entry',
  }]],
};

在我的main.js中，最顶部有以下两个导入：

import 'core-js/stable';
import 'regenerator-runtime/runtime';

我的vue.config.js

// eslint-disable-next-line import/no-extraneous-dependencies
const webpack = require('webpack');

const isProd = process.env.NODE_ENV === 'production';

module.exports = {
  configureWebpack: {
    // Set up all the aliases we use in our app.
    plugins: [
      new webpack.optimize.LimitChunkCountPlugin({
        maxChunks: 6,
      }),
    ],
  },
  css: {
    // Enable CSS source maps.
    sourceMap: !isProd,
  },
  transpileDependencies: ['vuex'],
};

Note as mentioned above I have tried both with and without the transpileDepedencies. It says here vue/babel-preset-app that es7.promise.finally is included as a default polyfill

Versions:

Microsoft Edge: 44.18
Microsoft EdgeHTML 18.18362
@vue/cli-plugin-babel": "^4.1.2"
"core-js": "^3.6.4"
"regenerator-runtime": "^0.13.3"

Update 13/02

So I tried to type Promise.prototype on my site in edge and it does appear it is polyfilled:

So currently I'm investigating if some part of my chain (axios/vue axios) does not return a promise. Since it is working in chrome I'm suspecting that a part of the chain is not being polyfilled correctly?

This is my entire chain:

/* VUEX MODULE ACTION */  
[a.ALL_CUSTOMERS](context) {
    context.commit(m.SET_CUSTOMER_LOADING, true);
    CustomerService.getAll()
      .then(({ data }) => {
        context.commit(m.SET_CUSTOMERS, data);
      })
      .finally(() => context.commit(m.SET_CUSTOMER_LOADING, false));
  },

/* CUSTOMER SERVICE */
import ApiService from '@/common/api.service';
const CustomerService = {
  getAll() {
    const resource = 'customers/';
    return ApiService.get(resource);
  },
...
}

/* API SERVICE */
import Vue from 'vue';
import axios from 'axios';
import VueAxios from 'vue-axios';

const ApiService = {
  init() {
    Vue.use(VueAxios, axios);
    let baseUrl = process.env.VUE_APP_APIURL;
    Vue.axios.defaults.baseURL = baseUrl;
  },

  setHeader() {
    Vue.axios.defaults.headers.common.Authorization = `Bearer ${getToken()}`;
  },

  get(resource) {
    this.setHeader();
    return Vue.axios.get(`${resource}`);
  },
  ...
}