Logitech Media Elite Func button

Logitech Media Elite Func button

"I have the aforementioned keyboard, and occasionally the ""Func"" key will get unpressed. It gets especially annoying when I try to rename a file, and start winword by accident, or try to refresh a page, and nothing happens (It's the undo - no effect inside a browser usually).
I know I can rebind those keys to just do nothing, but I just wanted to know why does the func mode changes by itself? Can it be something with power management/screen saver?"