Can't dim screen

I am unable to dim my screen lighting after a recent update - any clue on how to fix this?

I have this issue as well. Laptop screen does not dim in Manjaro Budgie after the specified time. Screen is lit up even after walking away for an hour (time is set to 5 minutes so it should dim after that). I have decided to move on to Solus (as I like the Budgie desktop), but just want to let the Manjaro team know of this bug. Thanks.