iPhone VPN Connected but Sync Pauses: Low Power Checks

Low Power Mode changes background behavior

Apple explains that Low Power Mode reduces background activity, including Background App Refresh and mail fetching. That is not evidence of VPN disconnection. The control varies by device and can be reviewed in battery settings.

Compare automatic and manual tasks

1. Record battery mode, time, network and Yunbao status before changing routes.
2. Choose a small non-sensitive task and observe automatic triggering separately from manual execution.
3. If battery level permits, temporarily turn off Low Power Mode and repeat the same task on the same network and route.
4. Record differences and restore your preferred power setting; avoid draining the battery or uploading large data for the test.
5. If manual execution also fails, preserve the error and investigate service access. If only automatic tasks pause, report those conditions to the app support.

Scope of the result

One comparison describes that task under those conditions. It does not establish that Low Power Mode stops Yunbao or that disabling it fixes every sync issue. Report automatic versus manual behavior without sharing mail credentials.