I upgraded to Big Sur 11.2.3 and now the toolbar brightness keys do not work. Brightness indicator appears on screen and the buttons appear to adjust up or down, but the actual brightness does not change unless I manually go into Display Settings and adjust.
I've seen old posts about this issue from ~5 months ago, all marked as resolved. Is this a new issue with the upgrade?
Have tried restarting and turning off / on all auto brightness settings. My system is 1 week old, M1 Macbook Pro.
Thanks for your help.