I suspect that AP CS teachers learned from ChatGPT.
Every year there are truly horrible AP teachers who cry because thier student got every question correct but still only got a 5. This is ok for a history or English teachers, they likely have no math ability, but not for science, math or computers..
For those of us who design good tests and understand the AP exam know that some students will randomly get questions correct, and many tests are designed to have very difficult questions, not only for benchmarking purpose, but also as a discriminator.
The AP exam is certainly designed to finely discriminate between the three levels of qualifications. Any single question is not significant. One year I recall a question that merely tested students ability to solve problems creatively.
This post shows all that is wrong with AP CS education. Worthless