WFM Adherence Metric Discrepancy in EU-West BYOC

Could someone clarify why the WFM adherence percentage in the Performance Dashboard diverges from the Quality Management audit logs? The environment is EU-West BYOC. Agents are logged in, but the dashboard reports 85% adherence while manual checks indicate 98%. The flow configuration has not changed.

Why does the Performance Dashboard adherence metric not align with actual agent status in a BYOC setup?