When managing multiple adminhtml tabs in a browser, idling for too long will result in being logged out. Consider a scenario where you have two tabs open, conveniently labeled
tab 1 and
tab 2, both currently active in the Magento backend.
After about 10 minutes of idling or so, you return to
tab 1 and navigate using the menu. When the page reloads, you have been logged out for being inactive for too long, and you once again log in.
If you switch over to
tab 2 now, and try navigate anywhere, instead of being logged out (because you have a new session) you are simply redirected to the dashboard.
Is there any way to prevent the dashboard redirection & continue regular navigation?
In other words, Magento knows that you're using the same browser (otherwise it would have logged you out) but it doesn't quite know how to handle your two different sessions, so it throws you to the dashboard and puts you on the now currently active session.