Pls. see if the unit shows any output for "sh crash". If so, pls. open a TAC case and provide them the crash info. along with a sh tech and we will be able to decode the crash and let you know if you are running into an already known issue and suggest a code upgrade accordingly.
If this is a new crash then, we would file a defect to address this.
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...