If you are terminating SSL on the ace the client connection to the ace is fully proxied since ACE needs to do all of the encryption and decryption. As such these client connections cannot be replicated to the standby ace and on failover the client would need to restablish their SSL session to the new ace (old connection is lost). SO the short answer is no ssl sessions are not sync'd to the standby ace.
This is true of every loadbalancer or ssl offloader on the market.