There is the following error popping up for every tool that uses s3proxy via the aws-sdk-java-v2 to access an azure backend: "Input is expected to be encoded in multiple of 2 bytes". The underlying issue is an AWS bug that expects even byte length Etags. Same issue as here: #96 but the workarounds don't work anymore with aws-sdk-java-v2.
The bug is fixed in version 2.35.0 of the aws-sdk-java-v2. However, most tools still use older versions of the sdk.
I worked around it by patching the aws sdk dependency directly in the affected jar. Ugly but works until projects update their aws sdk dependency: https://x.com/klaudworks/status/1980283274007081411