Doesn't happen to me, so just refresh the page and retry? If your problem persists, go to Johns profile and ask him to look into it, although as i said, it's not bugging for me.
jokes aside. it has not been noted before, and it does not happen to me, i would reccomend updating your browser, if its ie change to firefox or google chrome and yes, if it still happens, contact john the gameDev to see if he can help you.