Hello An,
Could you please provide the GAQL queries that you execute against group_placement_view and detail_placement_view where you are experiencing data discrepancies, and the customer report GAQL query as well?
Even better, if you could provide your customer id and request ids for the queries where you are experiencing these discrepancies it would help us analyze your issue.
If you prefer, you can provide these informations to us by using the "Reply privately to author" button.
Thanks,
Mattia Tommasone
Google Ads API Team

ref:_00D1U1174p._5004Q2bwYco:ref