Dapper orm Not closing oracle nclob on unbuffered stream .Query

We are using an oracle nclob for one of the columns in our database, while doing a "buffered: false" select of 8 million rows we would always run out of memory.

using (var connection = new OracleConnection(_databaseConfiguration.ConnectionString))
{
    connection.Open();
    var result = connection.Query<ClassWithNClob>(query, param, buffered: false);

    foreach (var element in result)
    {
        //do something with element that has a nclob
    }
}

We got around this by using the default OracleDataReader and when we wanted to access the nclob we wrapped it with a using statement. We would like to use Dapper for this as it would make the conversion much much simpler, but can't at this point.

using (var connection = new OracleConnection(_databaseConfiguration.ConnectionString))
{
    connection.Open();
    var command = new OracleCommand(query,connection);    
    using (OracleDataReader oraReader = oracleCommand.ExecuteReader())
    {
        while(oraReader.Read())
        {
            using(var blobStream = reader.GetOracleClob(2))
            {
                //something with bloblStream.Value
            }
        }
    }
}

We believe this is a bug, but is there something we are just missing?