I had this issue about a month ago using the nightly Chromium builds. I'm currently using a new build and no loner have this issue. Perhaps it's something in Chrome that will be fixed downstream [or so it seems]?
It's a problem in Chrome Beta, i'm seeing the issue also. Same when you quick reply to a thread, your avatar doesn't show in your post unless you refresh the thread your viewing.
Tried to downgrade Chrome, wouldn't let me and don't want to re-install losing all my settings
EDIT: Oh quick reply is working in Chrome Beta now (Avatar shows).