Solution : https://service.sap.com/sap/support/notes/687948 (SAP Service marketplace login required)
Key words :
terms sap gui, symptom parameters, current session, 620 patch level 7, explicitly set, url parameters, 20 patch level 7, ~disconnectonclose reason, html - ~disconnectonclose, ~disconnectonclose
Related Notes :
737798 | ITS: Forwarding POST parameters from the ITS frameset |
689291 | ITS: Disconnect on close for IACs |