Every screen in your dashboard — opening a section, saving a change, refreshing a list — was waiting on a check that ran twice over on every single request, and one of the two runs was thrown away without ever being looked at. It was the largest single cause of the pause you felt between clicking something and seeing it happen.
That duplicate check is gone, and requests that arrive together now share one answer instead of each asking the same question separately. Measured on our own account, an individual action went from roughly 125 to 70 milliseconds, and opening a section — which loads several things at once — went from roughly 195 to 100. Nothing about how you sign in or how your account is protected has changed, and there is nothing for you to do.