Storm, Earth and Fire - Summoner not dying

[Barorque]

As the title suggests, my custom Storm, Earth and Fire based ability produces a unit, when it dies, so should the hero... but instead the hero appears as a non-targetable unit, that attacks enemies as if he would be alive (hero icon shows him dead though).

When said hero runs out of targets to kill, only then does he actually die (hero death message and all).

There are no triggers to the ability, but it is an item used ability.

Any ideas why that happens?

 

[Barorque]

Alright, so it the spell is used normally (not activated by an item, but as a unit ability), this issue doesn't happen.

Is there perhaps a trigger to resolve the issue, if I still want to use this ability by item?

 

[Astrella]

Trigger it I'd say; item abilities have some weird quirks I've noticed.

 

[Dr Super Good]

Does the hero fire a death event when all summons die? If it does (and just the message is delayed) you can probably use triggers to move him to an empty spot on the map with no targets so the message instantly appears.