Lenovo Gaming Chromebook 16" (Tanik) - Keyboard backlight still on after shut down

Hi everyone, I am using Lenovo Gaming Chromebook 16 (Taniks), is there any case reported that after the computer is turned off, the keyboard backlight is still on.

Bonus: When turn off or sleep mode, signout, shutdown, the keyboard backlight is not in Windows Dynamic Lighting mode but it in random color like the video below.

I think it take 1 hour or longer to turn off the keyboard backlight after shutdown.

I see it like the Erp Ready on computer is not enabled, but here it is laptop.

My system info:
Windows 11 Pro 23H2
Coreboot 2405.0
Intel core i5 1215U (AlderLake)

Video recording of the operation showing the error: