DigitalOcean Spaces has a limited support for headers allowing any custom header start with x-amz-meta-
This creates incompatibility with Cloudflare Cache-Tag, see not allowing to add header "Cache-Tag".
Why there even is such limitation, why not to allow to add any header...
Also why it would add headers x-amz-request-id, X-HW, x-rgw-object-type without our concern, please remove it.