Print to CSV order is random

GSQL Queries
1

Hi! I am trying to print results to a CSV file, but I can’t make a header.
From the documentation, it says that:

In the query definition, the line "header" is printed first, followed by the println statements in the ACCUM clause, and "footer" is printed last. The output in the file follows this order because the order of query-body level statements is maintained in the output.

However, this is not what I am observing. The order of query-body level statements is NOT maintained.

Example:

CREATE OR REPLACE DISTRIBUTED QUERY csv_test() { 
    FILE output_file ("/home/tigergraph/gsql_output/csv_test.csv");
    PRINT "header" TO_CSV output_file;
    transfers = SELECT t FROM Customer -()- TransferDoc:t
                      ACCUM output_file.println(t.transfer_id, t.amount);
    PRINT "footer" TO_CSV output_file; 
}

So there are 3 query-body level statements in the query. I expected that “header” gets printed always first, but in fact it’s random. Sometimes is first, sometimes is at end of file.

Output example:

transfer1,250
transfer2,300
transfer_id,amount
footer

I understand that there is no order guaranteed on the “middle part”, the main content that comes from the SELECT. But I expected the header to be first, as the documentation says. What can I do to guarantee header to be the first line?

I am user TG Cloud. Tested in version 3.8.

Edit: Updated query to use println inside ACCUM instead of PRINT. Same result.