It show menu, then tying to load kernel, but fails.
ZFS: i/o error - all block copies unavailable
Installed via default installer.
Same setup on hyper-v 2012r2 works fine.
Same setup on FreeBSD 12,11,10 on hyper-v 2012 works fine.
Setup with root on UFS works fine.
A few more info, including one workaround: