Brightness Action Broken on Big Sur (M1)?

Questions & Suggestions
1

I'm running Keyboard Maestro 9.1 on Big Sur (M1, Apple Silicon). My "increase screen brightness" (and "decrease screen brightness") hotkey actions have stopped working. Ran great on Catalina.

When I trigger the "Increase Screen Brightness" action (or "try" it in the editor), it shows the on-screen pop-up as already being at full brightness, even if actual brightness is much less. Similarly, the "Decrease Screen Brightness" action always shows the on-screen pop-up as one-less-than full, regardless of where actual brightness is at. Neither action actually changes the brightness any longer.

Anyone else experiencing this?

2

Those actions simulate the hardware brightness keys, after which the system takes over and does its thing (or ignores the keystrokes).

How the system behaves is a bit of a mystery.

Your experience seems weird though since the system is clearly recognising the key, but then it seems like the brightness is being reset to full brightness all the time - perhaps there is some other process going on that is affecting the brightness?