Sap Fiori Client - not working logout

Hello Experts,

I downloaded Sap Fiori Client 1.4.0 : the "logout functionality" works on computer, but not working on SAP FIORI APP. I try with Samsung Note III and Samsung S4.

If I run the Fiori's link on Crome Browser on mobile, logout works fine.

Do you have any suggestion?

Thanks in advance.

Best Regards,

Marino