[Bug 260628] FreeBSD 12.3-Release got stuck during the boot process after the update (maybe nsswitch issue?)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260628

--- Comment #2 from Yoshisato Yanagisawa <osho@pcc-software.org> ---
> Which patch level? 

I hope you are asking patch level of 12.2R, then:
# uname -v
FreeBSD 12.2-RELEASE-p7 GENERIC
# freebsd-update fetch
Looking up update.FreeBSD.org mirrors... 2 mirrors found.
Fetching metadata signature for 12.2-RELEASE from update2.freebsd.org... done.
Fetching metadata index... done.
Inspecting system... done.
Preparing to download files... done.

No updates needed to update system to 12.2-RELEASE-p11.


I am not sure why uname and freebsd-update show different values.

Also, I use ZFS during the boot, and the root file system is also ZFS.
# cat /boot/loader.conf
kern.geom.label.disk_ident.enable="0"
kern.geom.label.gptid.enable="0"
opensolaris_load="YES"
zfs_load="YES"
# grep zfs /etc/rc.conf
zfs_enable="YES"

Is there any special procedure I should do for updating such environment?
As far as I understand from
https://docs.freebsd.org/en/books/handbook/cutting-edge/#updating-upgrading-freebsdupdate,
I should call nextboot only if I use a custom kernel, which I do not.
I usually postpone `zfs upgrade` until I confirm the new version is stable
enough because I do not know how to "downgrade" ZFS safely.  Note that I assume
there is no ZFS update between 12.2R and 12.3R.

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