As many players are already well aware of, faith leech node is seriously broken right now. Basically the node should convert all life leeching into energy shield leeching, but apparently this comes at the cost of losing your ENTIRE SHIELD when you start leeching (that is, hitting something) when the shield is 100% full.
SInce I feel like this node is kinda crucial for many many builds, as the analogous one is in path of exile, this bug should definitely be addressed as soon as possible.