Unable to fetch few tasknumber from approval related tables

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Hi Team,

We have a requirement to generate report for approval transactions (i.e approved/rejected).
For that we have built a query based on the below tables

1)hrc_txn_fnd_bpm_task_vl
2)fnd_bpm_task_history_vl
3)hcm_fusion_soainfra.wftask
4)hcm_fusion_soainfra.wftaskhistory

The query is working fine but there are some cases where I don't see few tasknumbers in the report
which was created 2-3 days ago.

Ex: Title for one of the tasknumber is "Termination for an employee"

Is there any other way of getting those tasknumbers (or) any frequency/process to insert data in above tables?