Eject key or screen saver is no longer responding.

I have assigned the start of screen saver to the eject key of Apple Magic Keyboard in BTT.
After updating to macOS 12.0.1, the screen saver does not start in many cases when I press the eject key.
Up to macOS 11.x, it always started every time I pressed the eject key.

In particular, after I start the screen saver and press any key to end the screen saver, the screen saver never starts even if I press the eject key again, unless I move the mouse cursor a little.
Is this caused by BTT?

  • M1 MacBook Air
  • macOS 12.0.1
  • BTT 3.622