I can confirm the same problem and the "Scroll Lock" workaround worked here too. I'm using my system with English language but the keyboard is the BR-ABNT2. I tried with different drivers of Nvidia and with Noveau, no difference. I'm using ubuntu 20.04.1 LTS.
I can confirm the same problem and the "Scroll Lock" workaround worked here too. I'm using my system with English language but the keyboard is the BR-ABNT2. I tried with different drivers of Nvidia and with Noveau, no difference. I'm using ubuntu 20.04.1 LTS.