Doppelgänger guise + Boneshatter Interaction

Doppelgänger Guise implies that you regen 10% of life over one second when hit. I would assume this creates a new instance of life regen every hit but it does not seem to be the case. After one instance of life regeneration, no other instances can be created until that one is finished. I am wondering if this is intended behavior as this makes the item not really useful for any self-hit build.