It’s most likely a warden type detection and will take a bit to find the triggers and rewrite bots.
Now that people know they don’t have to keep buying game, I expect blizz will be a little more interested in keeping up.
The real test will be if blizz reacts to that, as they have a habit of not doing so.
looks like a 24/7 detection thing now, because even before ban waves, if you try bot again, you will get banned in a few hours. It was never this away before...