We are migrating our application from Angular 11 -12 and we are targeting bundle only for es2015 we don't differential loading for ES5 and don't support ie 11 on .browserlistrc file. We had our application running on Angular 7 which is currently in the migration of Angular 12 and our API calls are initiator by Polyfills.js 1 in the network tab and it gets stuck. Kindly advise since I got confused since Angular Upgrade Guidelines say IE11 support will be depreciated and we stop doing differential loading and move forward but our API calls still use polyfills.js 1. What I am doing wrong? Kindly advise