When then screensaver is activated, pressing a button on the keyboard does not stop the show and display the lockscreen. The system bell chimes, but the screensaver show continues. If I press a button on the mouse, the screensavers stops and the lockscreen shows.
It's been a while, but I remember being able to stop the screensaver by pressing any key on the keyboard. Is there some way to re-enable this functionality?
Edit: I'm running 10.13.6 (17G65) High Sierra.