I'm using S3Proxy with azureblob as storage backend. Since S3Proxy 2.9.0, uploads of files larger than ~5.2mb fail. I created some files with random data and the 5.2mb file always works, while a 5.3mb file always fails with this error message:

One or more of the specified parts could not be found. The part may not have been uploaded, or the specified entity tag may not match the part's entity tag.

Uploading the same 5.3mb file works fine when I downgrade to S3Proxy 2.8.0