Query regarding sts token refresh error code on expiry

Dear Team, I have a query regarding STS token refresh. In the case of CEPH, when a token expires and we attempt any operation, we receive an "access denied" error. However, with other S3 providers like Amazon, we receive the correct error code "ExpiredToken." Is this discrepancy a known issue with CEPH , and if so, do we have plans to address it? Having "access denied" as the error code in the event of token expiry seems incorrect. Given the above scenario, please let us know how token refresh can be handled with CEPH ? Ajinkya Deshpande Sr Software Engineer NetBackup Engineering Veritas Technologies LLC Mobile: (7776835515) Ajinkya.Deshpande(a)veritas.com