Problem with vistor time on site.

Problem with vistor time on site.

Hi there, 

could you explain why the time spent by visitor on site is calculated even if the visitor left the website?

We performed 2 tests: 
a) Incognito session 
b) Proxy session

In both cases, the visitor after leaving the page, closing Google Chrome, was still on the "radar" and the time was calucalted. Avarage time spent on site with comparision to the Google Analytics is dramatically different. 

Looking for your reply. 
JD.