If you interact with the slider quickly the screen brightness will remain the same than before although the slider changed it's level. The screen brightness will not change until you interact with the slider again.
Related with this my feeling is that now they seem super unresponsive, they have some kind of delay or lag to them, or maybe inertia. Before they moved exactly as my finger moved, now they have some kind of weird behaviour Happening on my 14 Pro Max
EDIT:
Also if you slide your finger fast, they won't stay in the last position where your finger was but instead because of inertia they will move even after you have lifted your finger from the screen, but sometimes this happens even in the opposite direction