I've had two experiences like that and involving the "Educational Testing Service" of Princeton NJ and, granted that was a long time ago, these Common Core stories have a terribly familiar ring.
The most egregious case occurred while taking the Graduate Record Exam. The math part of the standard test involved paragraphs with several questions based on each paragraph and one of the paragraphs was totally ambiguous and all of the math majors who took the test when I did said the same thing. You could flip a coin as to which way to interpret the fricking thing and if you then worked all the questions logically, you either got them all right, or all wrong. Some people actually hedged their bets and worked half the questions as if the thing read the one way, and the other half as if the other.
Hope it isn’t just my imagination, sometimes they put stuff in those tests which isn’t even counted in the score — it’s just to see how people react.