mailbox issue?

I don't know if its an issue or not or me just being obsessive but I tend to notice the generic built in mailbox app doesn't refresh as quick as it used to. Maybe I expect it too quick who knows. All I know is it can say I have 1 unread message, I click on it and the app still says its unread for up to like 30 seconds after. Just a little gripe, maybe I shouldn't expect it to load quickly and maybe I am just now noticing it so any thoughts would be appreciated. Thanks