There are some problems under IE11 When I Use Custom App pages/_app.jsx

[178518]

Bug report

Describe the bug

When i use Custom App(pages/_app.jsx) Build an isomorphic application，It doesn't work very well in IE11，It prompts me that Symbol is undefined。But I imported polyfill.min.js globally in _document.jsx。

I tried with-polyfills、corejs、transform-runtime，But it didn’t solve my problem。

If i don't use Custom App，and only use custom document，It will run well。

I hope you can give me some help, thank you very much.

Github repository

repository

npm run dev

http://127.0.0.1:8088

Screenshots

1、IE11 Symbol undefined

2、i have Global import polyfill.js

System information

• OS: [macOS]
• Browser (if applies) [IE11]
• Version of Next.js: [9.4.4]
• Version of Node.js: [v10.21.0]