If you are deleting/clearing out your browsing history while the page is open, there is a chance that it will log you out of the page (and server), thus requesting for a new log-in. Please keep in mind that it will refresh every 60 seconds, and if you do not have a strong internet or a browser that is known to have connection problems, this may be good to take into consideration as well. I would suggest using a different browser, and see how that goes for you.