Phone keeps going to sleep with power save mode inactive

Hello.

I recently uninstalled the Avast App with power save mode ACTIVE.
Once it uninstalled, if I didn’t touch the screen for about 1 - 2 seconds my device would lock itself.
I reinstalled Avast, and the issue still persisted. I turned power save mode on, and it stopped.
However, whenever I charge my phone it goes out of power save mode and I have to turn it on to stop it from doing it.

I need this fixed asap, it’s screwed my phone.

Thanks.

Hi, what type of device, app and Android version do you use?

EDIT - Additionally, do you use “Power Save Mode” (Avast Mobile Security > Menu)?