Resonating shield bugged and not leeching

BUG

Resonating shield does not leech life or mana. The skill specifies its an attack thus it should leech.

FEEDBACK

This skill is one of the cooler abilities added in PoE 2, unfortunately the numbers on it are so far off its straight garbage. It has less than 100% damage effectiveness and its virtually impossible to scale it.

I currently have a shield with 1211 armor. The highest shield listed on the trade website currently is 1455. This means I am 83% of the highest shield listed on trade.

If we take a two handed mace, the highest DPS one on the market (with +6) is 1156DPS, 83% of that is 959DPS.

A character with a mace doing 959 DPS would one shotting virtually everything they come across.

If I was to open an item editor and create a shield that had perfect prefix 3 socket and 20quality it would be 1639 armor. Even with a shield that would be perfect Resonating shield still wouldn't do enough damage to be used.

What is the purpose of adding shields as a damage type only for them to not be able to do damage?

Another bug, Prism of Belief +3 skills does not increase the damage on Resonating shield.

This ability has everything going against it lol