Sims died instantly after successfully being brought back to life

Does anyone know why my sim still dies after being brought back to life? So at first he was abt to die and his wife pleaded to the grim reaper successfully and then like mins or hours (sims time) after that hes dead again and she successfully pleaded again and right after he got resurrected he instantly died again. I kept going back to my last saved game and this keeps happening. Is this really how the resurrection works? I dont have the life and death pack but as far as i remember they could live like for a couple days or something, not being dead again instantly. Is there anyway I could prevent this? Thanks.