Now, as the bug says, it is on release pending and it says, asa MAY fail to proxy ARP, so the fact that it works for some IPs or in other ASAs can be an option.
In order to identify if it is because of this same bug, you will need to setup a capture type ether-type arp and check on the ARP request from the upstream router and check if the FW is getting it, if it does but it does not answer, then it is because of this same bug.
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...