S3 selectObjectContent CSV output serialization not including headers

[travisemichael]

I am using S3AsyncClient#selectObjectContent to query files within a bucket. When querying CSV files within the bucket that have a header line and setting the FileHeaderInfo to "USE" the records that are streamed back using CSV output serialization do not include the header line. Is there a way to include the header line when serializing the returned records as CSV?

[debora-ito]

By the documentation on the API reference it should be including the file header info.
Can you share a sample code we can use to reproduce the issue?