Yes, I also noticed this, however no one else seemed to say anything about it so I assumed I misunderstood :/ I hope it gets fixed, 6% healing from FiB would be amazing.
I hope they don't, not sounding biased because I am a shadowtank. If the Dev's boost the self healing abilities with FiB then harnessed shadows will need a boost. If you are not familar the Dev's nerfed shadow self heals across the board in 1.3. But since the Dev's judged the healing from harnessed shadows as too powerfull, and nerfed it. They did the same when FiB healed more than 2%, they also fixed the bug where FiB healed without hitting anything. Just to bring it in line with all the other shadow self healing abilities.