Thanks for your answer.
The sync completed OK but the /dhp/* and /gdv/* files under this directory marker are not in the destination s3 bucket :
❯ rclone ls s3:bucket_s3/projects/project_name/bucket_gcs
1738 uploads/1601317336-test.csv
1738 uploads/1601321871-test.csv
1738 uploads/1601323175-test.csv
1738 uploads/1601323353-test.csv
Indeed but there is no HTTP transaction in the output . Apparently similar to this.