For your reference, the reasons for the background APPs shutting down automatically on the Redmi 13 are as follows:
1. The Android system dynamically manages background applications based on the current system resource availability to ensure the phone's performance and stable operation. If system resources (such as memory and CPU) are limited, the system will close some background APPs to free up resources, ensuring that foreground APPs and the system itself can function normally;
2. Running background APPs can consume significant battery power, especially those that require frequent network communication or background processing. To extend the phone's battery endurance, the Android system can proactively close some background APPs to prevent them from continuously draining the battery;
3. Closing some background APPs can reduce system load, and improve responsiveness and overall performance, which ensures that you have a better experience when using foreground applications;
4. To protect your privacy and security, the Android system will proactively close certain background APPs, especially those that abuse permissions or pose security risks.