"All of group out of zone" trigger not firing when group is destroyed in the zone

[Funky Monkey]

I'm seeing missions that used to work no longer work because they depend on the "all of group out of zone" trigger firing when the group is either destroyed in the zone or driven out of the zone.  If the entire target group is destroyed inside the zone, the trigger does not fire.  Is this intended?

I attached a track with 3 different groups and zones.

Ground-1 has 1 unit inside the zone and 1 unit outside the zone.  When the unit inside the zone gets destroyed, the trigger fires.

Ground-2 has a single unit that moves itself out of the zone, at which point the trigger fires.

Ground-3 has a single unit inside the zone and the trigger does not fire when the unit gets destroyed.

all-of-group-out-of-zone-bug.trk

[f-18hornet]

Thank you, reported for internal analysis.