Reproduction link or steps

https://stackblitz.com/edit/github-6a59pav1?file=src%2Findex.ts

Compare the source code and build code, notice which comments are kept

What is expected?

I figured all comments would be stripped from the build, even those beginning with webpack, no offense to webpack

What is actually happening?

Source code

Build

Any additional comments?

This is probably caused by something upstream (hardly any mention of webpack in this repo), just not sure if this is desired/intended behavior.