Actually, beep always happens in Safari and in Apple Music. In Chrome happen when focus is in blank url bar, not happens in other places. Not happens when something is selected. This is just a quick list - but sometimes it beeps sometimes not. IMO, most probably this is happening, because some "remnants" of key are passed to the underlying apps. E.g. Kurlig captures key-up, but not handles key-down. Or something similar. This is definitely never happen for any other lanchers, so IMO is a bug. Rather annoying, please fix.