camel-aws2-s3 multipart upload multiplies file by number of parts

for (int part = 1; filePosition < contentLength; part++) {
    ... 
    ...
    String etag = getEndpoint().getS3Client().uploadPart(uploadRequest, RequestBody.fromFile(filePayload)).eTag();
 ...

}

InputStream inputStream = FileUtils.openInputStream(file);
IOUtils.skip(inputStream, filePosition);

completedParts.add(
        CompletedPart.builder()
                .partNumber(part)
                .eTag(amazonS3Client.uploadPart(uploadRequest, RequestBody.fromInputStream(inputStream, partSize)).eTag())
                .build()
);