Nearly the same with version "OPNsense 24.1.5_1-amd64". After reboot the following error msg is in the system log,
Code Select
2024-04-04T15:06:38 Error opnsense /usr/local/etc/rc.bootup: The command '/sbin/umount '/var/unbound/lib'' returned exit code '1', the output was 'umount: /var/unbound/lib: not a file system root directory'