[memstick install] auto-zfs error

Hi All,

I tied to install a new FreeBSD-amd-12 system from official USB
installation memstick.img. Auto-UFS (GPT) installs fine and the system
boots fine. However, ZFS-Auto install succeeds, but is not loaded.
At the very beginning it gives something like "gpt sector XXXX error,
gpt sector 1 error, can't find zroot..."

Is it a known error / should I give more (precise) errors?

I tried two recent images with the same result:
ftp://ftp.freebsd.org/pub/FreeBSD/snapshots/ISO-IMAGES/12.0/FreeBSD-12.0-CURRENT-amd64-20170703-r320599-memstick.img
ftp://ftp.freebsd.org/pub/FreeBSD/snapshots/ISO-IMAGES/12.0/FreeBSD-12.0-CURRENT-amd64-20170626-r320360-memstick.img

Thanks all,
-- 
WBR, bsam