Cannot Reproduce Mail won't highlight until refreshed


I'm playing on the up-to-date Google Chrome and when I have the Mail messages window open (the window that lists all of my messages) and I receive a new message, the bottom envelope shows the correct number of new messages, but the mail window itself won't show me which messages are new unless I reopen it. I can click into a given message and the indicator on the bottom bar will properly tell me if I have fewer unread messages (and if I happen to click on a thread that has a new message in it, I can see that message), but the new messages don't go to the top of the list or show as unread until I re-open the menu.