In the last few days, I've come across four instances where a non-answer was left by a new user, that answer was deleted by the system after six Recommend Deletion votes in the review queues, then the poster promptly reversed that deletion with a single vote.
In each case, the answer had piled up quite a few "not an answer" or "very low quality" flags, which were all cleared the instant the answer was deleted by the system. However, the poster was able to single-handedly override all that when they undeleted their non-answer with a single vote. This required others to go and re-flag the answer and for a moderator to step in and delete it so that they couldn't restore the answer.
This seems like a bad design. A user should not be able to by themselves overturn deletion of their answers that were removed by a community vote in review.
I propose that answers deleted via five Recommend Deletion votes from the review queues require the normal three undelete votes that posts deleted using regular community delete votes do. This would prevent users from bringing back their non-answers after the flags on them had been cleared, potentially allowing non-answers to come back and clutter up the site.