KDE lockscreen (kscreenlocker_greet) high CPU usage

After KDE plasma 6 update, my CPU usage increased significantly while on lockscreen. This caused the processor to reach high temperatures and lose electricity unnecessarily. Main processes that caused this were:

Xorg --nolisten tcp [...]    # ~ 60% CPU usage
kwin_x11 --replace           # ~ 40% CPU usage
kwin_x11 --replace           # ~ 20% CPU usage

I suspect it has something to do with the multi monitor setup. **Solution:** To fix this you need to: 1. go to system settings > Display and Monitor > Compositor 2. Uncheck Enable on startup 3. Confirm 4. Reboot After that CPU usage on lockscreen goes back to normal.