Final answer:
It is true that a push notification is sent to guests using the Chick-fil-A One app when their mobile order is ready, as this is part of the app's functionality to improve customer service.
Step-by-step explanation:
When a mobile order is bumped from the Kitchen Production System (KPS) monitor at Chick-fil-A, it is true that a push notification is sent to the guest via the Chick-fil-A One app to inform them that their meal is ready. The Chick-fil-A One app is designed to enhance the customer experience by providing real-time updates on order status, including notifications when an order is ready for pickup. This system is part of the restaurant's commitment to efficient customer service and utilises technology to streamline the ordering process.