I am running a freshly installed Fedora 34 workstation with Gnome 40.4.0.
My keyboard is a wireless Logitech K360, which has multiple media keys: Volume up/down, mute, next/previous song, etc.
The media keys behave very strangely - when I press one of them (e.g. volume down) , I looks like they execute a “back action” - like when you press back in a web browser.
In Gnome settings for configuring keyboard shortcuts for audio control, the behaviour is strange too: whenever I want to configure a shortcut, my media keys don’t get recognized when I press them.
I have the K350 keyboard, and in the settings -> keyboard -> customize shortcuts -> sound and media panel (F34) I am able to set the keys for volume up/down/mute, previous/next track, play/pause, and stop. Can’t set anything else that I found for audio.
On mine (both fedora 33 & 34) all those keys were disabled by default.
Don’t know if it is related, or if you already know, but gnome extensions that used to be managed thru gnome-tweaks has been moved in gnome40 and is now found in the gnome-extensions package.
I have already installed that so I cannot compare with & without that package installed.
Without digging a lot deeper into how our installed packages for gnome compare that is the only recent change I am aware of.
Yep, anything between the keyboard and PC have a chance of interfering. I have not used a KVM for years because of that. Easier to move the transmitter than to have interference since I only work at home.