[2020] Bug or Feature? Vlad + Kegs

There’s a weird interaction between Vladimir and powder kegs; for some reason the damage from Vlad’s ability is done all at once but considered separate instances for kegs. For example, I attacked my enemy with two kegs (+2 damage) and had four people plus Vlad attacking. I expected vlad’s ability to get +2 from the kegs so it’d drain 3 from each ally and deal 3 for each to the enemy. What actually happened is he drained 3 from the first guy and then 1 from the rest and only dealt 6. I don’t know if this is a bug or a feature, but either way I find it misleading since in other cases of multiple damage from a single spell/ability like Make it Rain, the damage is applied to all three shots.