When you try to upvote a locked post, you end up with a message saying "locked posts can't be voted on":

Now when you try to upvote a comment related to a locked post - upvote that you also can't do - there is no message, but only the upvote arrow drawn and the upvote count of the comment erased:

I get that there is no "error" message when you fail to upvote a comment, but is it normal that the upvote count is not drawn again after some sec? The only way to see the upvote count is then to refresh the page.

(Not that this is a major bug, but this is really disturbing me!)