Unable to select boot environments in boot menu after upgrade to 12.0

[Mike Clarke]

I currently have 6 boot environments managed by beadm. Four of these are FreeBSD 11.2 and two are FreeBSD 12.0.

When either of the FreeBSD 12.0 environments are set as the active environment I'm unable to select alternative boot environments from the boot menu. Choosing option 7 from the menu only gives me 3 choices, e.g.:

1) Back to main menu
2) Active zfs:ssd/ROOT/fbsd12.0a (1 of 6)
3) bootfs zfs:ssd/ROOT/fbsd12.0a

Is this a bug or a 'feaure'?

-- 
Mike Clarke