So I recently specced into getting the "Faith Leech" node under the Warlock section of the passive tree, wherein Life Leech applies to Force Shield. I attack an enemy with my spells, and my force shield drops to 0. I attached a video link so that this bug appears in action. Note that I recently leveled up and specced into this node, and immediately after putting a passive point into it, I noticed that I was going down more than normal; in fact, almost immediately after casting an ability. I tested and found that it was indeed after casting an ability, and I assume it to be the fault of this node in particular. This is quite obtrusive and game breaking I feel, and needed the proper attention.

I made a video and put it on YouTube for viewing, link here: https://youtu.be/VrYM73BjXUY