Brightness bug still not fixed? Has been like this for years? More important with new icons really xD
Adaptive brightness = OFF.
Brightness still lowers by itself from 100 to 90%.
However, the brightness bar stays at 100%. So it is not possible to drag it back to 100%.
Only fix is: turning airplane mode on for 60 seconds -then swiping down at the brightness bar - and let us readjust it back to 100%. Now it shows 90% but can be slided back to 100%.