Think of it like language, was there ever Latin speaking parents that gave birth to a French speaking child? No, it’s a gradual change. Or take a color gradient from blue to red there’s a definite change taking place but picking out one specific spot in the middle might be purple

Without having looked it up yet, I would assume that the exposed contacts are neutral/ground

But it is in fact a carbon brush nonetheless

I think it usually depends on which state you’re in but most have a deputy governor or similar.

Experiencing the exact same issue on an Ulefone Armor 20 with Android 12 and the latest app version