I'm using KDE Neon 18.04 with all available updates installed. I'm trying to override media keys to control my media player with custom shortcuts. I don't have multimedia keys on my keyboard. When I try to override the global shorcuts or the auxiliary shortcuts in system settings, it's not working. I tried with another keyboard which had the media keys and they are working correctly, even if I don't map them. Whatever I set in the settings, my custom settings don't work and the default media keys continue to work.