I had that same new problem intermitent with a few of my customers
running 6.0.14 or 5.6.11. The Fortigate seem to keep in memory the IP
address of the previous connections from that same user, doesnt clear
his cache.
I am having exactly the same problem. I would like a specific VPN tunnel
to connect by itself without having the user using the connect button.
Did you find a solution ? Thanks