I upgraded my TW 
and I found out that "bind" doesn't start during boot. If I start it later by
command "systemctl start named" service is starting without problem.
A few second after boot the result of "runlevel" command is unknown. 

# systemctl is-enabled named
named.service is not a native service, redirecting to systemd-sysv-install.
Executing: /usr/lib/systemd/systemd-sysv-install is-enabled named
Can't determine current runlevel
disabled



But a minute later the result of "runlevel" command is N 3.

# systemctl is-enabled named
named.service is not a native service, redirecting to systemd-sysv-install.
Executing: /usr/lib/systemd/systemd-sysv-install is-enabled named
enabled