> they don't fully understand, the patch looks fine

I don't get this part. Why is the reviewer signing off on it? AI code should be fully documented (probably more so than a human could) and require new tests. Code review gates should not change

I mean the same can happen with human-written code no? Reviewer signs off on it and subtle bug in edge case no one saw?

Or you mean the velocity of commits will be so much that reviewers will start making more mistakes?