Clean installing Windows 10 1903 solved BlueLight Filter bug.

XdxD

Although G3-572 is a great laptop, its BlueLight filter was the biggest annoyance for me. Even if the toggle was turned on in Acer Quick Access, filter would turn off randomly and most of the times whenever a USB device was being connected/disconnected even if the switch was on "on" position. After clean installing Windows 1903 and installing all the drivers from Support site and updating them through Device Manager (especially the Intel Graphics Driver), my BlueLight filter stays on now no matter how many times I connect/disconnect anything to/from the USB ports. I am using the old Acer Quick Access application btw (2.01.3025, quite old for 2019). So, those who have this problem in any Windows 10 build, try clean-installing Windows 10, 1903. Hope this helps. I'd like to add that even newer Quick Access from Helios 700 didn't solve it in upgraded 1903 for me.

XdxD

I'd also like to add that BlueLight filter and other Acer Quick Access features turn on automatically after sign-in screen.