Caps Lock LED (and keyboard brightness) stuck after a while (MacBook Pro 14,1)

[LapisLazulis]

For some reason I can't find any info on this bug, but whatever distro/DE/WM I'm using, for some reason, when booting my computer it's actually working, but after some moment (can be a few minutes or a few hours) the caps lock LED/keyboard brightness do not want to change their setting. For example, about the caps lock LED, even setting echo 0 | sudo tee /sys/class/leds/input5::capslock/brightness or echo 1 (on both input5/input13) does not work: the values are set but the LED will remain turned on no matter what.

MacBook Pro 14,1, using Manjaro here (but as I said I've had this problem in Fedora too so it's not distro-dependant), i3wm (but this happens in KDE/GNOME too so not WM/DE dependant)