Predictive Routing API missing trunk metadata for APAC BYOC

Having some config trouble here correctly when querying predictive routing metrics for our 15 APAC BYOC trunks via the trunk metrics endpoints. The response consistently omits the trunk_id field for calls routed through secondary carriers during failover events, breaking our regional capacity reporting.

Context:
We are using Genesys Cloud API v2 with standard BYOC trunk configurations. This issue specifically impacts our Singapore and Jakarta regions where failover triggers frequently.

Question:
Is there a known limitation or configuration setting that suppresses trunk metadata in predictive routing analytics during carrier failover, or should this be flagged as a platform defect?