Vivo
You can follow these steps to fix Shift Work Schedule background work:
1. Add the apps to
Speedup whitelist;
2. Turn the apps on in
High background power consumption;
3. Allow the apps to
Autostart.
Enable the auto-start setting for the Shift Work Schedule app. Open
Manager, click A
pp Manager, then
Autostart manager, and then allow Shift Work Schedule App to auto-start in the background.
For Funtouch OS 3.0 and higher version, go to
Settings > Battery > High background power consumption, then you can allow or disallow apps to run in the background even though they consume much power.
For the below Funtouch OS 3.0 version, go to
i Manager > Power manager > Excessive background battery usage, then you can allow or disallow apps to run in the background even though they consume much power.
NOTE: For more info check this visual tutorial
https://www.vivo.com/en/support/questionList?categoryId=46