This issue occurs due to the device’s background battery protection policy, which is designed to optimize power consumption by limiting background activity. When the screen is locked or an APP is sent to the background, its network access can be restricted to conserve battery life. This can affect certain APPs that require continuous internet access for real-time updates, notifications, or background syncing.
To resolve this, you can adjust the battery settings to allow unrestricted network access:
1. Go to [Settings];
2. Enter [Battery];
3. Select the specific APP;
4. Enable [No restrictions]. This will ensure that the APP can run in the background without network limitations.