Solaris Zone recovery on Solaris 11 and newer takes time to reconfigure after a BMR restore during first boot
During first boot after a Bare Metal Restore (BMR) restore operation, BMR reconfigures the zones using detach-attach commands. These commands may take some time to run if there are a large number of zones that need to be configured. After the BMR first boot command execution completes, the zpool, zones, and ZFS configurations may take some time to settle down with the new configuration.
Wait about 10 minutes after first boot (more depending on the number of zones) so that the system returns to the correct configuration state. You should not restart the system or log into any zones until that time to ensure a complete recovery.