Angular 8.3.21, ng build with target es 2015 doesn't show sourcemapped ts/css files in browser for debugging

[hereisjai]

Updated Angular cli to latest version (8.3.21) and from then my new projects are not showing ts/css files in the chrome/firefox browser dev tools.

Sourcemap files are available in the dist folder.

Modifying the target flag to es2015 in tsconfig.json builds only the es2015 browser support files and then am able to find the ts files in the developer tools debugger section.

Thank you!