ASP.NET Core 2.0 (Kestrel) Static File Response Compression Is Enabled Without Any Middleware

I have an Asp.Net Core 2.0 app which serves an Angular2 app. I have NOT enabled any form of response compression. I.e. I haven't used  the response compression middleware.

However, the server (kestrel running locally) seems to be sending out gzipped static files. Why is this happening and how can i prevent this?

Here is a screen grab of the chrome network tab for the javascript requests:
https://user-images.githubusercontent.com/2267992/30713572-8d422ad2-9ec4-11e7-818b-4cbad33aee91.png