Hi Joshua,
Thanks!
We suspect that the issue might be caused by the use of placeholders we set in the creatives. By the way, how are macros in creatives handled during the creative approval process? If we submit creatives with some self-defined macros via the REST API, and after they get approved, we replace those macros with actual values in bid responses, will this trigger a re-submission of the creatives and cause their status to return to PENDING_REVIEW?
Best,
Edison