I know Illinois and Texas have biometric privacy laws; I would guess it's related to that. (I am in Illinois and cannot access the demo, so I don't know what if anything it's doing which would be in violation.)
It's because their biometric privacy laws are written in such a general way that detecting the presence of a face is considered illegal.
I'm kinda on board with this.
So there will be a lot of blurry portraits coming from Illinois and Texas as autofocus can't find faces? /s