[VX ACE] RESPAWNING ENEMY PROBLEM.

Hi, my problem is, I want a monster to reappear 6 turns after it's killed, but stop respawning after the boss is dead.
Here's what I have so far.

As far as I can work out, I've told it to check if Garuda Buddy is dead and if it is, to revive it every 6 turns. Then cease doing that once Garuda is dead.
But Garuda Buddy only revives once 6 turns after its first death and then stays permanently dead.
I'm using Yanfly's ATB, if that makes a difference.
What am I doing wrong?

Thank you so much, that works now!