Eh, when is that, though? I'm always worrying about the bugs that I haven't noticed if I don't review the changes. The other day, I gave it a four-step algorithm to implement, and it skipped three of the steps because it didn't think they were necessary (they were).
It may be the size of the changes you're asking for. I tend to micromanage it. I don't know your algorithm, but if it's complex enough, I may have done 4 separate prompts - one for each step.
It was really simple, just traversing a list up and down twice. It just didn't see the reason why, so it skipped it all (the reason was to prevent race conditions).
