Craft Transform Issue

BaseAssetSourceType.php

<?php
/**
 * Copy a transform for a file from source location to target location.
 *
 * @param AssetFileModel           $file             The assetFileModel that has the transform to copy.
 * @param string                   $targetFolderPath The target folder path.
 * @param AssetTransformIndexModel $source           The source transform index data.
 * @param AssetTransformIndexModel $target           The destination transform index data.
 *
 * @return mixed
 */
public function copyTransform(AssetFileModel $file, $targetFolderPath, AssetTransformIndexModel $source, AssetTransformIndexModel $target)
{
    $sourceTransformPath = $file->folderPath.craft()->assetTransforms->getTransformSubpath($file, $source);
    $targetTransformPath = $targetFolderPath.craft()->assetTransforms->getTransformSubpath($file, $target);

    if ($sourceTransformPath == $targetTransformPath)
    {
        return true;
    }

    return $this->copySourceFile($sourceTransformPath, $targetTransformPath);
}

S3AssetSourceType.php

<?php

/**
 * @inheritDoc BaseAssetSourceType::copySourceFile()
 *
 * @param $sourceUri
 * @param $targetUri
 *
 * @return bool
 */
protected function copySourceFile($sourceUri, $targetUri)
{
    if ($sourceUri == $targetUri)
    {
        return true;
    }

    $bucket = $this->getSettings()->bucket;

    if (is_null($this->_s3)) {
        $this->_prepareForRequests();
    }

    return (bool) @$this->_s3->copyObject($bucket, $sourceUri, $bucket, $targetUri, $this->_getACL());
}