After the review that prompted python/cpython#3077 (comment), I did a second review where I replied to some of Yury & Serhiy's comments.

Bedevere picked that up as a new review and repeated its comment: python/cpython#3077 (comment)

Without knowing the details of how Bedevere works, I'm guessing the simplest way of avoiding that would be to skip commenting if the "awaiting changes" label is already set.