Caterpillar feeding on Phyllanthus plant. Does Species of Phyllanthus matter?

Butterflies lay their egg on host plants on which caterpillars can feed on after getting hatched and survive. Cubists have found Catterpillars on Phyllanthus as well as Cardamine plants.
A Caterpillar was found feeding on Phyllanthus plant by Sakshi, further on looking this Theertha also tried to feed her Caterpillar with Phyllanthus. We know that Butterflies are very specific to their host plants.
One of the caterpillar died after eating another Phyllanthus species.
Does species of leaf fed to caterpillar matter?

Really ! Whose caterpillar died due to eating other leaves…
From where did you get this information?
Please involve that cubist for verifying this