Battery drain and bugs

[Salman786]

After software update battery drains more quicker. Nd few apps are not quick. And also moving files to secure folder isn't working. Was fine before the latest update in 21ultra. 

[xSteveuk]

Hi
Since installing the new update
Try clearing the phone cache
https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/
And check for app updates

[adamlee]

Power consumption increases after a system update 

Your phone undergoes a series of optimisation procedures in the background after a system update has been completed, which increases the battery drain speed. For example, some apps will need to be readapted: Gallery will be smartly reorganised, and files will be scanned again to detect security risks.

These procedures will be completed within five hours if the phone is fully charged and idle, or within three days under normal use. This optimisation process may take longer if the phone is used frequently during this period. Once the optimisation is completed, the standby time will return to normal.

[Salman786]

There's no explanation for s21ultra. To boot into recovery mood.