Raise Spectre - Imperfect Dark Marionette does not reform and cannot be summon again

I raised 2 Imperfect Dark Marionette with Guardian Blessing for a extra aura.
I dont have any investment of minion stat, so it just keep dying and I am too lazy to check they are alive and keep pressing the aura skill.
So basically it does nothing most the time.

Since i still need to roll the implict of my boots where i socket the skill gem,
i have tried to re-socket the Raise Spectre gem in hideout and it do summon the dark marionettes (there is no any corpse).

But I'm not sure where or when, the minion is lost and I cannot summon it again thought the skill, unless I buy another corpse to summon a new one.

Does it not reforming when it die and I left the map, so it lost?
Or it will lose when I re-login?