Symptom
IPV6 Modified sVTI tunnel source ip information is not pushed to the FTD from FMC-7.2.2.-54.
firepower# show run int tunnel 2
!
interface Tunnel2
nameif SVTIV6-KPSA
no ip address
ipv6 address 5511::2/64
tunnel source interface KP-HA-6-outside ipv6
tunnel destination 5555::1
tunnel mode ipsec ipv6
tunnel protection ipsec profile FMC_IPSEC_PROFILE_2
Conditions
Established sVTI tunnel between two devices and use tunnel source as IPV6.
Later modified tunnel source IP for one of the device and pushed configuration from FMC.
Workaround
After modified tunnel source ip, please goto that policy page and select "edit VTI" option and select the modified IP from the dropdown of tunnel source and save the config. Now deploy the config from FMC and verify the config in device console.
Further Problem Description
Need to fix for further releases.