A financial services company is implementing a new Architect flow for its high-value clients. A key requirement is that if the estimated wait time (EWT) for the 'Premium_Support' queue exceeds 180 seconds, the call should be offered an immediate callback. A junior developer has implemented the logic, but testing reveals that the callback option is never triggered, even during peak hours with long wait times. The developer confirms the correct queue ID is being used. What is the most likely cause of this issue?