CDN Problem Loading .jsx Files from AWS CloudFront

I am having a problem when we load the static assets (images, js, css, jsx) for our website from an S3/CloudFront CDN on AWS. Specifically, the jsx files don't download at all. These files load perfectly when the static assets are loaded from our web server. When we attempt to load the static assets from and AWS/S3/CloudFront CDN all the assets load perfectly with the exception of the jsx files which the browser fails to locate. For some reason the path to the jsx files get a .js extension appended to them so they appear with a .[login to view URL] extension. e.g. Instead of loading [login to view URL] as it should, it tries to load the file as [login to view URL] which simply does not exist. I can't workout why the .js extension is being appended to the jsx files when they are accessed from the CDN. If you think you know why this is happening and have a solution for me submit your proposal and I will send you the full details. Thanks.