I’m developing an iOS app that utilizes the user’s sleep data recorded in HealthKit. The app fetches raw sleep analysis samples from HealthKit and computes insights such as sleep efficiency and sleep depth. While it generally works well, I’ve encountered an issue with data updates.
Problem:

In the morning, when I wake up, the sleep data in my app doesn’t update immediately.
Even after force-quitting and relaunching my app, the data remains outdated.
However, if I open Apple’s Health app, view the sleep data, and then return to my app, the data in my app updates instantly.

Questions:

Why does this behavior occur?
What is the mechanism by which HealthKit makes updated data available for third-party apps to fetch?
Is there a way to ensure my app always has the most up-to-date sleep data without requiring the user to open the Health app first?

Any insights into HealthKit’s data update process or suggestions for improving my app’s data synchronization would be greatly appreciated.
Technical details:

iOS version: 17.5.1
Xcode version: 15.3

Thank you in advance for your help!