System upload not using s3 cdn url

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So I’m still confused here…even with my cloudfront url in the “s3 cdn url”, all uploaded images (in the preview or not) are using the s3.dualstack url and not my cloudfront/cdn url.

What am I missing?

Here are my settings:

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This seems like a bug, not a feature, as it requires you to have public ACLs for your s3 bucket. Looks like it has been reported here years ago, but not fixed: S3 CDN URL ignored when uploading into posts