Can you please provide a sample configuration on setting up two ACE appliances for redundancy. Also, if you have two redundant ACEs, does the config is copied from the active to the standby or do i have to configure the standby separately?
From the following link
"ACE automatically includes the FT VLAN in the VLAN trunk link"
It means FT ports are put by default in trunk mode. Could you change the ports on the switches to trunk port and see if it works.