Person detection ignores detection zone,V2 detects people outside of detection zone

Can anyone confirm or deny that AI is now detection zone bound?
I have had problems with all (5+) of my v3 cameras not registering AI detection for months now. The hit rate was maybe 1 in 5, usually 1 in 10. Some cameras would never register a person. Ever. In all cases motion was detected just fine.
I recently opened up the detection zones on a couple of cameras to include more of the screen that would have a person in it (think head to toe) and presto! Now ALL of the cameras are recording AI events correctly and at a high success rate.
Not sure if I like this “feature” or not. I would really like the option of AI being bound by the detection zone or the whole frame. I can see use cases for both.