Pdfs are not pushed to WCC while bursting to Content Server

We are bursting pdfs to content server. The job runs as success and we can see subjobs and pdf outputs in job history
But those pdfs are not pushed to WCC (Content server)

If we manually run a job without bursting, using "Content server" destination in UI, the output is seen in WCC
But when bursting pdfs dont come in WCC

Pls comment

Bursting query

SELECT DISTINCT
"Created By" AS "KEY",
'PDF' "OUTPUT_FORMAT",
'WCC' DEL_CHANNEL,
'fa_ucm_3' PARAMETER1,
'Attachments' PARAMETER2,
'TestAuthor' PARAMETER3,
'Test_Burst' PARAMETER5,
"Created By" || '.pdf' PARAMETER6,
'Test' PARAMETER7,
'on' PARAMETER9,
'/Users/FAAdmin' PARAMETER10
FROM
"Service - CRM Service Requests Real Time"."Service Request";

FA version
11.13.24.04.0_00.0.00

Oracle Analytics Publisher
12.2.6.1.10