Used to be that I could refresh any power bi service page countless times without any issues. But its been a few months since myself and other users have started noticing this weird thing where if I try to refresh the browser, every now and then I get this screen asking me to sign in -
And here's the thing.... I don't actually have to sign in. All I need to do is type in https://app.powerbi.com in the address bar and hit enter. And everything is back to normal.