Multipart upload issues with Cloudflare R2 using S3 api. Some S3 compatible object storage systems like R2 require that all multipart chunks are the same size. This was mostly true before, except the final chunk was larger than the requested chunk size which causes uploads to fail.

    Problem shows itself on OpenShift CI clusters intermittently.

This behavior has been causing 504 Gateway Timeout issues in the image registry instances in OpenShift CI clusters.
It is connected to uploading big images (i.e 35GB), but we do not currently have the exact steps that reproduce it.

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    https://github.com/distribution/distribution/issues/3873 
    https://github.com/distribution/distribution/issues/3873#issuecomment-2258926705
    https://developers.cloudflare.com/r2/api/workers/workers-api-reference/#r2multipartupload-definition (look for "uniform in size")