Already bug reported.
Not working as per release note:
Here's a screenshot showing existing tool tip, and existing functionality.Warforged Healer's Friend now reduces the Positive Energy healing penalty for being in Living Construct form instead of acting as a multiplicative Positive Energy healing amplification effect. The enhancement now grants a bigger overall bonus, but is no longer quite so front-loaded: Warforged Healer's Friend: Benefit: Your Living Construct penalty to Positive Energy healing is reduced from 50% to (40/30/20)%. The enhancement has also been reduced in AP cost from 2:4:6 to 1:2:3.