split tunnel does work via anyconnect. If what you want is to prevent the 192.168.X.X net to be tunneled you need a different approach. In your case remember that the ACL you chose to use for split tunnel will be read in such a way that the source of that ACL is what will be pushed back to the client as the "Secure Routes" (what will be encrypted) In your case, you would need to use exclude specified:
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...