To reproduce:

1. yarn build && yarn serve in the root folder and also in RemoteApp
2. Open up localhost:3000 in the browser
3. Check the console to see that there is an error: "634.js:50 Uncaught TypeError: (0 , _dom__WEBPACK_IMPORTED_MODULE_0__.a) is not a function"

If you change mode for RemoteApp to development then it will work fine