after investigate, i can catch issue. by wrong logic in javascript. at page call Clients.confirmClose ("message") to display close confirm, logic to call event close page is ignore.
i will report to zk community and make a hot fix for idempiere
Carlos Ruiz October 23, 2014 at 1:54 PM
even closing the browser (not just the tab) - when the browser is restarted the session is still open
Tested on the demozk7 server - I open a session, close the tab, the browser popup warning me appears and I choose to abandon the session.
If you then open a tab and go to that server, you can see the session was not closed.
This was implemented with ticket https://idempiere.atlassian.net/browse/IDEMPIERE-984#icft=IDEMPIERE-984 but seems that is broken.