My images are hosted on AWS S3. When I am on Flexible mode, they load correctly on my website.
But when I change to Full mode, I start to get Error 522.
My setup is pretty standard. I have a bucket named images.example.com. And a DNS on Cloudflare with CNAMEimages, and target images.example.com.s3.us-east-2.amazonaws.com.
I have already read these threads, but none of them have a real solution: