See post #14 in the link for the workaround. It did the trick for my Asus laptop. There’s no kernel patch yet, afaik.
You could also install the 5.4 LTS kernel (use on-screen keyboard for that).
EDIT: @philm You might wanna look into that. It has been reported here and on the arch forum not only by Asus users but also by Acer users. Affected are all 5.8 and 5.9 kernels that I have tried so far. No problems reported with linux54 LTS.
Here’s the topic that I opened a couple weeks ago in order to find a solution:
I also tried a workaround using an udev rule - which is working for me. No idea how to fix that stuff on the kernel side.