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Ubuntu 21.04 - Keyboard backlight problem after suspend/wake up

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I have the Asus ROG Zephyrus 2021 version G14 (GA401QE) which I received FreeDOS and using it dual boot with Windows 10 installed first and then Ubuntu 21.04 with kernel 5.13.4.

I had trouble with WIFI card (Mediatek mt7921), but manually updating kernel version to 5.13.4 (on linux git, it states that it is fixed 5.12+ ) solved it. So no problem there now and everything works great except the minor problem with keyboard backlight.

Basically the problem is, when waking up from sleep, keyboard backlight just stays in breathing mode (as if it is still in sleep) and no way to turn it off or even adjust the brightness. Normally, when in sleep, backlight is in breathing mode. After waking up it just stays like that and no way to control it, which makes me think that backlight control is not "waking up".

It is just stuck in that mode until restarting the PC.
It is a minor thing, but it bothers me a lot.

I also came across similar things, but those are related to booting and not being able to control Fn key etc. About /etc/systemed/ I don't know if anyone came across a similar problem.

Anyone has any idea how to fix this?

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