https://us.community.samsung.com/t5/Discussions/Brightness-slider-lagging/m-p/2359079/highlight/true
Re: Brightness slider lagging - Samsung Community - 2358374
Aug 29, 2022 - Mine does the same thing. Only when you actually slide your finger though. I just tap it where I want it since it's smooth that way. - 2358374
samsung communitybrightnesssliderlagging