"No such namespace" warning when referring to JS module namespace without using alias

Currently, when requiring a JS module it is not possible to refer to it using the original namespace. For example, the following code will result in a warning:

And the resulting JavaScript will throw the following error:

However, defining an alias for the JS module and using it works fine, for example:

Here is a minimal repo to reproduce this problem: https://github.com/mneise/my-calculator.