We observed a throughput degradation with swift versions 1.61 - 1.69 (those two versions tested heavily, observed the degradation) compared to 1.42 - 1.48 (those two versions tested heavily without observed degradation).
At the same time replications into S3 buckets worked as expected, without any throughput impact.
The solution is the workaround, replication into swift targets are managed with rclone version 1.48 and replications into S3 buckets with 1.61 or 1.69 .
Are you aware of this behaviour?
Regards