Log out time only works when the brower tab is open

Hello,

The plugin seems to be wokinrg fine, except for one [important] situation: When users are not using actively the tab, the plugin won’t start the countdown, which renders the plugin completely ineffective for the purpose it states to solve.

When I go back to a browser’s tab in which a sesion was opened much time ago (1 o 2 days), as soon as I go back again to such tab, the message appears telling the that I will be log out in 10, 9, … 3, 2, 1 seconds, and then it logs me out.

This means that the plugin does not close the session for truly inactive users (as it is supposed to work) but only fot those users who leave the tab open and wait (with no activity) for X time, which is not how a website is usually used.

Is this how the plugin is supposed to work, or is there something wrong with my website?

Thank you.