FortiOS v4.3.1 - IPSec VPN Problem with Interface Mode

After the Update with the FortiOS v4.3.1 the "mode-cfg" will be set to enable. After that, the Interface Mode IPSec VPN doesn't work anymore.
In the Release Notes you can read the following:

Description: Option “mode-cfg” was turn on by default and thus can cause phase1 mismatch during tunnel initialization when interface mode IPSec Phase1 was configured via Web UI.Bug ID: 146113

Workaround: Use the CLI command “config vpn ipsec phase1-interface>set mode-cfg disable” to disable it.

Status: To be fixed in a future release.

CLI:
config vpn ipsec phase1-interface
  edit
    set mode-cfg disable
end