The same issue with me. check the config.. Fail over not working.
ASA-2# show running-config: Saved
:: Serial Number: FLM2013FVLR: Hardware: FPR4K-SM-12, 58269 MB RAM, CPU Xeon E5 series 2194 MHz, 1 CPU (24 cores):ASA Version 9.6(1)!hostname ASA-2ena...