Missing Sprite/Animation on Death due to Ability Score Drain

[Purudaya]

Hi everyone - like the title says, I'm trying to figure out a problem with character sprites disappearing when an ability score is reduced to zero or below.

I created an ability that reduces an enemy's constitution similarly to the way Illithids consume intelligence. It works as planned, but whenever I use it to reduce a party member to 0 or less constitution (causing death), their sprite just disappears rather than displaying a death animation and staying on the ground. They still drop their equipment like normal and leave behind a greyed-out portrait, but otherwise there's no trace of them (I checked that they're not being chunked due to excess damage). Does anyone know why this might be or how to fix it?

Thanks in advance for any feedback, I'm really puzzled here.