Identify what actually stopped
Connect to the same route and note the time before locking. After waking, inspect the app status before testing the same page. An app exit, a disconnected VPN and one failed page are separate observations, not proof of a bad server.
Review background battery access
Google Pixel help describes app battery and background-use controls. Other Android brands may use different menus; follow your device settings. This is not a Yunbao-specific feature.
Run two comparable trials
- Keep the device, Wi-Fi and route fixed; record status and waiting time.
- Inspect the Yunbao app battery controls; if background access is restricted, temporarily adjust only that app.
- Repeat the same waiting period and record app exit, disconnection and page loading separately.
- If there is no improvement, restore the original setting and report model, OS version and times to distinguish a network change from an app exit.