Setting method:
1. Turn on the background app lock, setting path:
realme UI 7.0 & 6.0 & 5.0 & 4.0 & 3.0: Swipe up from the bottom of the phone > Recent task > Click the three points in the upper right corner of the app menu > Lock.
realme UI 2.0: Swipe up from the bottom of the phone > Recent task > Click the two points in the upper right corner of the app menu > Lock.
realme UI R & S & Go Edition: Swipe up from the bottom of the phone > Recent task > Swipe up on the lock icon slightly > Lock.
realme UI T & U Edition: Not supported

2. Turn off the power saving mode.realme UI 7.0: Settings> Battery > Power saving settings > Turn off the power saving mode.
realme UI 2.0 & 3.0 4.0 & 5.0 & 6.0: Settings > Battery > Power saving mode.
realme UI R & T & S & Go & U Edition: Settings > Battery > Power saver