I have a function which which changes the storage class of an S3 object. The function works except tags are ***not*** being copied

```py

        def to_deep_archive(s3_key):
        '''
        Set the storage to DEEP_ARCHIVE
        Copied from https://stackoverflow.com/questions/39309846/how-to-change-storage-class-of-existing-key-via-boto3
        '''
        s3 = boto3.client('s3')

        # Source data to move to DEEP_ARCHIVE
        copy_source = {
                'Bucket' : BUCKET,
                'Key' : s3_key
        }

        # TODO : encryption
        # convert to DEEP_ARCHIVE by copying
        s3.copy(
                copy_source,
                BUCKET,
                s3_key,
                ExtraArgs = {
                        'StorageClass' : 'DEEP_ARCHIVE',
                        'MetadataDirective' : 'COPY',
                        'TaggingDirective' : 'COPY',
                        'ServerSideEncryption' : 'AES256'
                }
        )

```

There was no exception thrown. My role policy looks something like this:

```
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "VisualEditor0",
            "Effect": "Allow",
            "Action": [
                "s3:DeleteObjectTagging",
                "s3:GetObject",
                "s3:GetObjectTagging",
                "s3:PutObjectTagging",
                "s3:ReplicateTags"
            ],
            "Resource": "arn:aws:s3:::my_bucket/*"
        }
    ]
}

```

My bucket policy looks like this:

```
        {
            "Sid": "Stmt1492757001621",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::my_account:role/my_role"
            },
            "Action": [
                "s3:GetObject",
                "s3:GetObjectTagging",
                "s3:PutObjectTagging",
                "s3:DeleteObjectTagging",
                "s3:ListBucket",
                "s3:ReplicateTags"
            ],
            "Resource": [
                "arn:aws:s3:::my_bucket/*",
                "arn:aws:s3:::my_bucket"
            ]
        }

```

Is there something else I need to do?