The issue is still occuring on the save i was using. also the summon only was avaliable after i did a battle where i attempted to summon and it failed and the next battle it was revived?) Very weird
Viewing post in Kadajah's Battle Summon System for RPG Maker MZ comments
The script to revive characters is triggered during XP distribution; if the character has been dead from the start, that script isn't being called. In your case, please try the following test: load your game and run this command in the console:
$gameActors.actor(ID).setHp($gameActors.actor(ID).mhp);
Replace "ID" with your summon's ID from the actors list. This script fully restores HP, so the character should come back to life and be ready to be summoned again; then, check if the behavior has been fixed.