Taking a wild guess at this. There are some unanswered puzzles that are entertaining to watch, and some that aren’t. There was one where the answer was “candy” and some of the clues were “dandy” “liquor” and “quicker.” Of course everyone in the audience, at home, and Willy Wonka fans far-n-wide were screaming the answer on the inside, while the contestants struggled and strained as time went on.
Then there are some puzzles that are probably complete duds. Poor clues, poor clue giving, poor guessing, and an answer so misconstrued that probably even had Allen scratching his head. Those usually end up on the cutting room floor, I’d imagine.