1. OS? Windows 10
2. Versions. 1.0.0-beta.1

3.Created a sample app using angular cli and created a service under shared folder.
Run ng build -prod
Run ng serve -prod
Get error

"Error loading http://localhost:4200/app/shared/index.js as "./app/shared" from http://localhost:4200/main.js ; Zone: ; Task: Promise.then ; Value: Error: Error: XHR error (404 Not Found) loading http://localhost:4200/app/shared/index.js(…)"

1. Not happening in dev build/

test.zip