The achievement “What’s All the Buzz About?” (a new achievement in the Gameplay - Core (Hydra) section) is not tracking progress from games in ranked wild. Several of the other achievements in this section are correctly tracking progress.
I played a game with Druid in ranked Wild ladder earlier today in an effort to progress this achievement. I found that even when I played Earthen Scales on a low attack minion I was still not being awarded progress as my achievement is currently showing 0 on progress.