studio display brightness function key not working
I connected my M2 Macbook Pro to studio display. usually i closed the Macbook pro and only use studio display as my monitor. Then i connected with a bluetooth keyboard with mac compatible function key on top such as volume control, keyboard back brightness control.
All other function seem working fine, I can control Studio display volume, control bluetooth keyboard brightness. So i find out the brightness control key only can control my macbook screen even i closed lid. im still able to control the brightness manually in setting.
Is this a bug? or is designed like this?