OnTimerStart freezes if tab/window focus switched #166
Description
I am using 2.2.7 package version due to my app is in version angular 8. And I am subscribed to the onTimerStart method but if the window/tab focus is switched to some other tab or window. The count value doesn't return any value and sometime it delays which eventually results in incorrect value of the idle time. It started to work fine when I switch back to the tab/window. Any workaround to this as I wanted to show counter to my user if they are and in X seconds they will be logged out.