Hi!
Thanks for your feedback.
We remember similar issue present in the past for iDrive when their server-side encryption is enabled.
Can you let me know if you use their SSE?
Do you use S3Drive built-in E2E encryption?
Please specify your iDrive endpoint, in principal S3Drive tries to detect iDrive and then applies specific settings to overcome some problems, perhaps this hasn't worked as it should in this case.
Thanks!