Same thing has been happening to me for ages. You ever found a fix? I vaguely suspect it's some sort of leftover interaction with the remains of the easter egg from _previous_ android version. But that's just a vague suspicion.
But yeah, did you ever find a solution to this?
sorry for the late reply; yeah, im pretty sure its either from the remains from a previous android easter eggs, or the current one. With android 12, you are supposed to have a visualized color pallet, but because samsung uses their own slightly tweaked color pallet, they might have gutted this feature, just not entirely.