tuesday Steps to reproduce: Visit a feedback/bug report page, such as the one you're looking at right now. Mouse over to the left to display the "recent posts" sidebar. Vote on one of the posts. You will be added as a follower to the post you are currently visiting (this one). Expected behavior: You should be added as a follower to the post you just voted for.
tuesday It appears that more broadly, voting adds you as a follower to the page you're currently on, so voting on issues from the homepage won't add you as a follower either.
B4ND1T Can't reproduce this on Orion or Brave, I don't get added as a follower to either, I believe that is intended. Creating or replying to a thread adds you as a follower but not voting for it.