If a person has Shields, They are protecting there hero from taking any damage from you.

A Shield is a buff.

Life Steal heals based on the damage dealt to the champion, not to a buff.

It has been this way for a very long time.

hello RAWJR

just like PLAYER J stated, a shield is a buff, and as such is treated as a buff, which means nothing applies to it beyond ''buff rules''

just like a continuous heal is a buff, healing bonus does not apply to continuous heals, because they are a buff, and not cast healings

so hitting a shield, is just hitting a ''buff'' and not the enemy hp, therefore you're not dealing dmg (to the champion) but when youre doing is you're interacting with the shield buff mechanic

that said, a shield can be removed/stolen, since its a buff, so yes you can heal from it because it a buff, but you can steal/remove it, because its a buff


i understand where you're coming from, you're dealing dmg, therefore you should heal, but because a ''shield'' is a buff, buff rules apply to it, both the positive and negative effects. 


hope that helps

regards

ophe