Walking calamity and Atalui's Bloodletting doesn't work

Well, Atalui's Bloodletting does not add any phys damage to Walking Calamity.

I confirmed that other sources of damage as extra phys actually works, so i assume its a problem with the gem. (Tested with Dangerous Blossom node)

Just in case: Im playing blood mage bear build with blood magic allocated. Currently my walking calamity costs 462 life, thus i should be getting full 40% of damage as extra phys.