Yuumi will take periodic damage from maintained effects even while attached

I was playing a game and was attached to a Diana who was losing to a Mundo. I popped off with probably 400 health left bopped the Mundo, and reattached to the Diana. I still managed to die while attached to the Diana despite not being targetable and there was no way his red smite could do 400 points worth of true damage.

I looked at the death recap and showed that his W had done an insane amount of damage to me despite only being detached for a second. My guess would be that the code thought I was still in Mundos target AOE despite being attached to Diana, so the effect never ended.

Please fix.

EDIT: If this behavior is intended, Yuumi should not be taking damage from non-targeted area of effect damage while attached to a target. You can't even really see your health bar while attached so to potentially die while attached an untargetable seems unfair, especially since you cannot heal yourself while attached.