[Bug]Posting removes comments from view.

http://i.imgur.com/5VkAoEk.jpg

I've been seeing this happen sporadically when I post. When I refresh the page, I find that my post actually goes through, but I can't see any posts at all until I refresh the page. This doesn't happen every time, but it seems that once it happens it gets more likely to happen. That may just be perception though, as it could be random.

#Reproduction steps

1. Type a comment
2. Click Post
3. Repeat above two steps until you see something similar to the picture