Hello,

This has been discussed before, but from what I know, gzip compression is not fully supported on the Spaces CDN. This is most likely off to ensure the most compatability of end users who pull resources from the CDN. Even though most browsers across many devices support gzip.

You can also open a ticket wit their support team and they can fully explain if gzip compression is switched off or just some static content is compressed by default or if they’re using something else on their end.

Let us know how it goes.

Alex