AFAICT, all cases are correct.
Correct cases in this context means "they have an input/output pairing that matches the problem statement".
Your initial message, reworded, claims "there exists code that can solve the validator IOs, but not all tests." Such code, obviously, is incorrect. Correct for code means "solves the problem statement".
We can help fix that by adding validators (and tests, for symmetry) that are correct as well, but make incorrect code from the previous paragraph fail. Would you be able to provide such cases? Or, at least, to describe how to build them?